Disclosure of Invention
Based on this, it is necessary to provide a conductive connection structure of an indoor weak current box monitoring security device for solving the problems of the existing BNC connector.
The above purpose is achieved by the following technical scheme:
The conductive connection structure of the indoor weak current box monitoring security protection device comprises a connector body and an inner barrel, wherein the connector body is connected with the end part of a cable through the inner barrel, an outer barrel is sleeved on the inner barrel and the cable in a sliding mode, the cable is provided with a shielding layer, the shielding layer is in a first state of being folded along the axial direction before the inner barrel is connected with the end part of the cable, the outer barrel is slid to the inner barrel by the cable after the inner barrel is connected with the end part of the cable, and the shielding layer is kept to enter between the outer barrel and the inner barrel in the first state.
Further, a convex ring is arranged between the outer cylinder and the inner cylinder, and after the outer cylinder slides to the inner cylinder, the convex ring presses the shielding layer.
Further, the convex ring is arranged on the inner wall of the outer cylinder.
Further, a plurality of convex rings are arranged at equal intervals along the axial direction of the convex rings.
Further, an annular groove is formed in the outer wall of the inner cylinder, and after the outer cylinder slides to the inner cylinder, the convex ring extrudes the shielding layer into the annular groove.
Further, the cable assembly further comprises a movable ring with a diameter capable of being changed, the movable ring can clamp the shielding layer and enable the shielding layer to be folded along the axial direction of the movable ring before the inner cylinder is connected with the end portion of the cable, and the shielding layer can enter the annular groove along with the movable ring after the inner cylinder is connected with the end portion of the cable.
Further, the movable ring is formed with a notch in a circumferential direction thereof.
Further, the outer cylinder is cylindrical, an opening is formed in the outer cylinder along the length direction of the outer cylinder, and a connecting piece is arranged at the opening and used for locking the size of the opening.
Further, the plurality of openings are provided at equal intervals in the circumferential direction of the outer cylinder.
The connector has the beneficial effects that the outer cylinder is sleeved on the cable, the surface layer at the end part of the cable is removed, the shielding layer is folded along the axial direction of the shielding layer in a direction far away from the end part of the cable, then the inner cylinder is connected with the end part of the cable, the outer cylinder drives the shielding layer to keep a folded state and enter between the outer cylinder and the inner cylinder in the process that the outer cylinder slides from the cable to the inner cylinder, so that the connector body is connected with the end part of the cable through the inner cylinder, the loosening degree and the stress of the braiding structure of the shielding layer in the circumferential direction are uniform, and meanwhile, the shielding layer is in the axial folding state, so that the crimping process is not needed, the circumferential deformation of the inner part of the cable is uniform under the action of the outer cylinder, the connection stability of the connector body is improved, and the possibility of loosening caused by external force interference is reduced.
Detailed Description
The present invention will be further described in detail below with reference to examples, which are provided to illustrate the objects, technical solutions and advantages of the present invention. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The numbering of components herein, such as "first," "second," etc., is used merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
As shown in fig. 1 to 12, the embodiment of the invention provides a conductive connection structure of an indoor weak current box monitoring security device, which comprises a connector body 100 and an inner barrel 101, wherein the connector body 100 is connected with the end part of a cable 200 through the inner barrel 101, the inner barrel 101 and the cable 200 are sleeved with an outer barrel 102 in a sliding way, the cable 200 is provided with a shielding layer 201, the shielding layer 201 is in a first state of being folded along the axial direction before the inner barrel 101 is connected with the end part of the cable 200, after the inner barrel 101 is connected with the end part of the cable 200, the outer barrel 102 is slid to the inner barrel 101 by the cable 200, and the shielding layer 201 is kept in the first state and enters between the outer barrel 102 and the inner barrel 101.
Firstly, the outer cylinder 102 is sleeved on the cable 200, the surface layer 205 at the end part of the cable 200 is removed, the shielding layer 201 is folded along the axial direction of the shielding layer in a direction away from the end part of the cable 200, then the inner cylinder 101 is connected with the end part of the cable 200, in the process that the outer cylinder 102 slides from the cable 200 to the inner cylinder 101, the outer cylinder 102 drives the shielding layer 201 to keep a folded state and enter between the outer cylinder 102 and the inner cylinder 101, so that the connector body 100 is connected with the end part of the cable 200 through the inner cylinder 101, the loosening degree and the stress of the braiding structure of the shielding layer 201 in the circumferential direction are uniform, and meanwhile, the shielding layer 201 is in an axial folded state, so that the compression joint process is not needed, the circumferential deformation of the inner part of the cable 200 is uniform under the action of the outer cylinder 102, the connection stability of the connector body 100 is improved, and the possibility of loosening caused by external force interference is reduced.
Referring to fig. 7, 8, 10 and 11, the cable 200 includes, from inside to outside, a battery cell 202, a foaming layer 203, a tinfoil layer 204, a shielding layer 201 and a skin layer 205. The shield layer 201 has a braided structure, which is made of a highly conductive, flexible metallic material, such as copper. The connector body 100 is provided with a clamping groove locking structure, so that quick plugging and stable connection are realized, accidental falling is prevented, and the connector body 100 is provided with a knob, so that the connector body is convenient to rotate and plug. The connector body 100 is internally provided with a central needle 103, one end of the central needle 103 is provided with a connecting blind hole, the central needle is connected with the electric core 202 when in use, the other end of the central needle 103 is provided with a conical needle head, and the central needle head is inserted into equipment to transmit signals when in use.
When the conventional connector body 100 is used, the outer cylinder 102 is sleeved at the end of the cable 200, the outer cylinder 102 is firstly stripped from the end of the cable 200 to remove the surface layer 205 with a certain length, the shielding layer 201 is turned out, so that the shielding layer 201 is loose and disordered, then the tinfoil layer 204 and the foaming layer 203 with a certain length are stripped to expose the battery core 202 with a certain length, the center needle 103 is arranged at the end of the exposed battery core 202 through the connecting blind hole, then the center needle 103 is crimped to the end of the battery core 202 by using a crimping pliers, the inner cylinder 101 of the connector body 100 is sleeved at the end of the cable 200, the turned-out shielding layer 201 is wrapped outside the inner cylinder 101, the outer cylinder 102 is slid to the inner cylinder 101 by the cable 200, the shielding layer 201 is extruded between the outer cylinder 102 and the inner cylinder 101 at the moment, and the outer cylinder 102 is extruded by using the crimping pliers to carry out the crimping process, so that the connector body 100 is connected with the end of the cable 200.
In order to avoid that the braided structure of the shielding layer 201 is loosened in the circumferential direction of the cable 200 after the shielding layer 201 is turned out, the shielding layer 201 is folded along the axial direction of the cable by the conductive connection structure, so that regular changes are generated in the circumferential direction of the shielding layer 201 when the shielding layer 201 is turned out, see fig. 7 and 8, that is, the loosening degree of the braided structure of the shielding layer 201 in the circumferential direction is uniform, so that the shielding layer 201 is uniformly stressed in the circumferential direction, but it is worth explaining that the material of the shielding layer 201 is not deformed. In order to avoid uneven circumferential deformation inside the cable 200 caused by conventional crimping, the conductive connection structure does not need to perform a crimping process, and the shielding layer 201 folded along the axial direction is mutually matched and extruded by the outer cylinder 102 and the inner cylinder 101 so as to realize stable connection between the connector body 100 and the cable 200.
Wherein the inner diameter of the outer barrel 102 may be greater than the outer diameter of the cable 200, and the outer diameter of the inner barrel 101 may be equal to the outer diameter of the cable 200. One end of the inner tube 101 is integrally formed with the connector body 100, and the other end of the inner tube 101 is provided with a butt blind hole. In use, after the skin 205, the shielding 201 and the tinfoil 204 are stripped, the end of the cable 200 is inserted into the blind abutment hole of the inner barrel 101, i.e. the foamed layer 203 of the cable 200 abuts inside the blind abutment hole.
Preferably, a collar 104 is provided between the outer barrel 102 and the inner barrel 101, the collar 104 compressing the shield 201 after the outer barrel 102 is slid to the inner barrel 101.
The convex ring 104 is used for extruding the shielding layer 201, so that the fixing stability of the shielding layer 201 is improved, and the shielding layer 201 is prevented from moving.
It should be noted that, the inner wall of the outer cylinder 102 and the outer wall of the inner cylinder 101 also have an extrusion effect on the shielding layer 201 folded along the axial direction, but the extrusion effect on the shielding layer 201 at the convex ring 104 is obvious, and the extrusion force is maximum.
The collar 104 may be a plurality of protrusions disposed on the inner wall of the outer cylinder 102 or the outer wall of the inner cylinder 101 to press the shielding layer 201.
Preferably, collar 104 is disposed on the inner wall of outer barrel 102.
Wherein, an inner diameter of collar 104 may be equal to or greater than an outer diameter of cable 200. Rounded corners are formed on the edges of the end surfaces of the convex rings 104.
As a structural modification of the present invention, a convex ring 104 is provided on the outer wall of the inner cylinder 101.
Preferably, a plurality of collars 104 are provided at equal intervals along the axial direction thereof to further promote the fixation stability to the shield layer 201.
Wherein, convex ring 104 is provided with at least two, preferably three. The pitch and cross-sectional dimensions of collars 104 may be selectively arranged.
Preferably, the outer wall of the inner cylinder 101 is provided with a ring groove 105, and after the outer cylinder 102 slides to the inner cylinder 101, the convex ring 104 presses the shielding layer 201 into the ring groove 105, so as to further improve the fixing stability of the shielding layer 201.
Wherein the cross-sectional dimension of ring groove 105 is larger than the cross-sectional dimension of collar 104 so that shield 201 can be received between ring groove 105 and collar 104.
Preferably, the cable further comprises a movable ring 106 with a diameter capable of being changed, wherein the movable ring 106 can clamp the shielding layer 201 before the inner barrel 101 is connected with the end of the cable 200, and enable the shielding layer 201 to be folded along the axial direction of the shielding layer 201, and the shielding layer 201 can enter the annular groove 105 along with the movable ring 106 after the inner barrel 101 is connected with the end of the cable 200.
After a length of the skin 205 is stripped from the end of the cable 200, the shield 201 is exposed. The diameter of the movable ring 106 is increased, the movable ring 106 is sleeved on the shielding layer 201 from the end part of the cable 200, the diameter of the movable ring 106 is reduced to clamp the shielding layer 201, the movable ring 106 is pushed to fold the shielding layer 201 along the axial direction thereof, the steps are repeated, a plurality of movable rings 106 are sleeved on the shielding layer 201, the intervals between adjacent movable rings 106 are the same, and correspondingly, the shielding layer 201 is folded in a corrugated shape along the axial direction thereof.
The inner tube 101 is connected to the end of the cable 200, and the movable ring 106 is slid in sequence from the end closest to the cable 200 in a direction approaching the connector body 100, while the movable ring 106 maintains the clamped state of the shielding layer 201 until the movable ring 106 slides into the corresponding annular groove 105, and the shielding layer 201 is also brought into the corresponding annular groove 105 by the movable ring 106, at which time the shielding layer 201 is still in the first state folded in the axial direction thereof.
The outer cylinder 102 is pushed to slide from the cable 200 to the inner cylinder 101 until the convex ring 104 presses the corresponding movable ring 106 to reduce the diameter and passes over the movable ring 106, at this time, the convex ring 104 presses the shielding layer 201, and the pressing position is located at one side of the movable ring 106 near the connector body 100, so as to avoid the outer cylinder 102 from moving along the axial direction thereof, thereby realizing the connection of the connector body 100 with the end of the cable 200 through the inner cylinder 101.
When the movable ring 106 clamps the shielding layer 201, there is a static friction force between the two, so that moving the movable ring 106 can correspondingly move the shielding layer 201. Of course, the end of the shielding layer 201 can be pulled manually to facilitate movement.
Of course, the movable ring 106 may not be provided, and the shielding layer 201 may be folded and moved in the axial direction thereof directly manually.
Preferably, referring to fig. 2, the movable ring 106 is notched in its circumferential direction.
The movable ring 106 may be made of metal materials such as phosphor bronze, beryllium copper, or stainless steel, but the influence on signal transmission needs to be avoided, for example, the movable ring 106 is electrically connected to the connector body 100 or the shielding layer 201, so that the movable ring is in an equipotential state, and an additional loop is avoided, or the movable ring 106 is ensured to be only contacted with the shielding layer 201 and isolated from the battery core 202 in an insulating manner. Of course, the movable ring 106 may also be made of engineering plastic such as nylon, which has good insulation. Of course, the movable ring 106 may be integrally made of an elastic material so as to change its diameter.
Preferably, referring to fig. 12, the outer cylinder 102 has a cylindrical shape, an opening 300 is formed in the outer cylinder 102 along a length direction thereof, and a connector is provided at the opening 300 for locking the size of the opening 300.
The cable 200 and the shielding layer 201 are pressed by the inner wall of the cylindrical outer barrel 102, so that the circumferential stress is more uniform.
The connecting piece is a V-shaped bending plate 301, two ends of the outer cylinder 102 are formed by the opening 300, one end of the outer cylinder 102 is connected with an arc plate 302, the arc plate 302 and the outer cylinder 102 are arranged concentrically, the diameter of the outer cylinder 102 is equal to that of the outer cylinder, the other end of the outer cylinder 102 is connected with one end of the V-shaped bending plate 301, the other end of the V-shaped bending plate 301 is connected with the arc plate 302, and the sum of the thickness of two sections of the V-shaped bending plate 301 and the thickness of the arc plate 302 is equal to that of the outer cylinder 102. After the above-mentioned installation process, the outer cylinder 102 is crimped by using the circular crimp hole of the special crimp pliers, the crimp pliers are operated to apply pressure to the wall of the outer cylinder 102, so that the V-shaped bending plate 301 is bent to a state overlapping with the arc plate 302, and at this time, the outer cylinder 102 and the arc plate 302 together form a perfect circle, so that the extrusion force applied by the cable 200 and the shielding layer 201 in the circumferential direction is more uniform, and the connection stability of the connector body 100 is improved.
Wherein, before crimping, the inner hole of the outer barrel 102 is irregular, and the size of the inner hole is enough to enable the outer barrel 102 to be sleeved on the cable 200, and after crimping, namely, when the outer barrel 102 forms a right circular inner hole, the diameter of the right circular inner hole is smaller than the outer diameter of the shielding layer 201, so as to realize crimping effect.
The regular polygon press hole of the conventional press pliers is used to press the outer cylinder 102, and the number of sides of the regular polygon press hole can be increased to reduce the circumferential deformation difference generated inside the cable 200.
Preferably, the plurality of openings 300 are provided at equal intervals in the circumferential direction of the outer tube 102 to further make the pressing force applied to the cable 200 and the shield layer 201 in the circumferential direction more uniform.
When the invention is used, the outer cylinder 102 is sleeved at the end part of the cable 200, the end part of the cable 200 starts to strip the surface layer 205 with a certain length, the shielding layer 201 is exposed, the movable ring 106 with the increased diameter is sleeved on the shielding layer 201 from the end part of the cable 200, the diameter of the movable ring 106 is reduced to clamp the shielding layer 201, the movable ring 106 is pushed to fold the shielding layer 201 along the axial direction, and the steps are repeated to sleeve the movable rings 106 on the shielding layer 201 at equal intervals, so that the shielding layer 201 is folded in a corrugated shape along the axial direction, as shown in fig. 7 and 8.
The method comprises the steps of stripping a tinfoil layer 204 and a foaming layer 203 with a certain length to expose a certain length of a battery core 202, crimping a central needle 103 to the end part of the battery core 202 by utilizing crimping pliers, sleeving the inner barrel 101 of the connector body 100 to the end part of a cable 200, sequentially sliding a movable ring 106 towards the direction close to the connector body 100 from the end part closest to the cable 200, simultaneously keeping the movable ring 106 in a clamping state on the shielding layer 201 until the movable ring 106 slides into a corresponding annular groove 105, and bringing the shielding layer 201 into the corresponding annular groove 105 by the movable ring 106, wherein the shielding layer 201 is still in a first state of being folded along the axial direction of the shielding layer, namely the shielding layer 201 in the first state is wrapped outside the inner barrel 101.
The outer barrel 102 is pushed to slide from the cable 200 to the inner barrel 101 until the convex ring 104 extrudes the corresponding movable ring 106 to reduce the diameter of the cable and passes over the movable ring 106, as shown in fig. 10 and 11, the convex ring 104 extrudes the shielding layer 201, and the extrusion position is positioned on one side of the movable ring 106 close to the connector body 100, so that the outer barrel 102 is prevented from moving along the axial direction, the connector body 100 is connected with the end part of the cable 200 through the inner barrel 101, the loosening degree and the stress of the braiding structure of the shielding layer 201 in the circumferential direction are uniform, and meanwhile, the shielding layer 201 is in an axial folding state, so that the compression joint process is not needed, the circumferential deformation of the cable 200 is uniform under the action of the outer barrel 102, the connection stability of the connector body 100 is improved, and the possibility of loosening caused by the interference of external force is reduced.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.