A conductive connection structure for an indoor weak current box monitoring security device

Abstract

The present invention provides a conductive connection structure of an indoor weak-current box monitoring security device, comprising a connector body and an inner cylinder. The outer cylinder is sleeved on the cable, and the surface layer of the cable end is removed, and the shielding layer is folded along its axial direction in a direction away from the cable end, and then the inner cylinder is connected to the end of the cable. In the process of the outer cylinder sliding from the cable to the inner cylinder, the outer cylinder drives the shielding layer to maintain a folded state and enter between the outer cylinder and the inner cylinder, so as to connect the connector body to the end of the cable through the inner cylinder. The braided structure of the shielding layer is loose and uniform in its circumferential direction. At the same time, the shielding layer is in an axially folded state, so there is no need for a crimping process. Under the action of the outer cylinder, the internal circumferential deformation of the cable is uniform, which improves the connection stability of the connector body and reduces the possibility of loosening due to external force interference.

Description

Technical Field

[0001] The present invention relates to the technical field of radio frequency connectors, in particular to a conductive connection structure of an indoor weak current box monitoring and security device. Background Art

[0002] With the rapid development of intelligent security technology, indoor weak-current box monitoring and security devices, as the core of building security systems, are gradually evolving towards integration and modularization. These devices, based on the weak-current box as their physical foundation, integrate functional modules such as video surveillance, intrusion alarms, device power supply, and signal transmission to achieve real-time monitoring and centralized control of indoor security status. In complex electromagnetic environments and high-density wiring scenarios, the stability and reliability of signal transmission between functional modules become key factors affecting the overall system performance.

[0003] In security surveillance systems, the transmission quality of video signals directly determines image clarity and real-time performance. Efficient connection and interference resistance of radio frequency (RF) signals are crucial for ensuring the integrity of video surveillance data. Currently, BNC (Bayonet Neill-Concelman) connectors are widely used for coaxial cable termination and signal transmission due to their quick plug-in / plug-out characteristics, stable impedance matching, and excellent electromagnetic interference resistance. Especially in space-constrained and equipment-intensive environments such as low-voltage power distribution boxes, BNC connectors, through their standardized interface design, enable efficient interconnection between video surveillance equipment and transmission lines, making them an indispensable and key component in security systems.

[0004] Currently, there are the following defects when terminating a BNC connector on a cable: First, after the cable shielding layer is turned out, the braided structure tends to become loose and messy in the circumferential direction of the cable, resulting in uneven force on the shielding layer, reducing the connection stability of the BNC connector and making it easily loose due to external interference; second, the regular polygonal pressing hole of the commonly used crimping pliers squeezes the metal sleeve, which tends to cause circumferential deformation differences inside the cable, affecting the stability of the connection.

[0005] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the Invention

[0006] Based on this, it is necessary to provide a conductive connection structure for an indoor weak current box monitoring security device to address the problems existing in the current BNC connector.

[0007] The above purpose is achieved through the following technical solutions:

[0008] A conductive connection structure for an indoor weak-current box monitoring security device comprises a connector body and an inner cylinder, wherein the connector body is connected to the end of a cable via the inner cylinder, an outer cylinder is slidably sleeved on the inner cylinder and the cable, and the cable has a shielding layer; before the inner cylinder is connected to the end of the cable, the shielding layer is in a first state folded along its axial direction; after the inner cylinder is connected to the end of the cable, the outer cylinder slides from the cable to the inner cylinder, and allows the shielding layer to maintain the first state and enter between the outer cylinder and the inner cylinder.

[0009] Furthermore, a convex ring is provided between the outer cylinder and the inner cylinder, and after the outer cylinder slides into the inner cylinder, the convex ring squeezes the shielding layer.

[0010] Furthermore, the convex ring is arranged on the inner wall of the outer cylinder.

[0011] Furthermore, a plurality of the convex rings are arranged at equal intervals along the axial direction.

[0012] Furthermore, an annular groove is provided on the outer wall of the inner cylinder. After the outer cylinder slides into the inner cylinder, the convex ring squeezes the shielding layer into the annular groove.

[0013] Furthermore, it also includes a movable ring whose diameter can be changed. Before the inner cylinder is connected to the end of the cable, the movable ring can clamp the shielding layer and fold the shielding layer along its axial direction. After the inner cylinder is connected to the end of the cable, the shielding layer can enter the annular groove along with the movable ring.

[0014] Furthermore, the movable ring is formed with a notch in its circumference.

[0015] Furthermore, the outer cylinder is cylindrical, and an opening is formed on the outer cylinder along its length direction. A connecting piece is provided at the opening for locking the size of the opening.

[0016] Furthermore, a plurality of the openings are arranged at equal intervals along the circumference of the outer cylinder.

[0017] The beneficial effects of the present invention are as follows: the present invention first sleeves the outer tube on the cable, removes the surface layer of the cable end, folds the shielding layer along its axial direction away from the cable end, and then connects the inner tube to the end of the cable. In the process of the outer tube sliding from the cable to the inner tube, the outer tube drives the shielding layer to maintain a folded state and enter between the outer tube and the inner tube, so as to connect the connector body to the end of the cable through the inner tube. The braided structure of the shielding layer is loose and uniform in its circumferential direction. At the same time, the shielding layer is in an axially folded state, so there is no need for a crimping process. Under the action of the outer tube, the internal circumferential deformation of the cable is uniform, which improves the connection stability of the connector body and reduces the possibility of loosening due to external force interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An axonometric diagram of the conductive connection structure of the indoor weak current box monitoring and security device provided by an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Exploded diagram of the conductive connection structure of the monitoring and security device for the weak-current box in the middle room;

[0020] Figure 3 for Figure 1 A side view of the conductive connection structure of the monitoring and security device in the weak current box in the middle room;

[0021] Figure 4 for Figure 3 AA sectional view of the conductive connection structure of the monitoring and security device of the weak current box in the middle room;

[0022] Figure 5 for Figure 4 A schematic diagram of the structure of the outer cylinder of the conductive connection structure of the monitoring security device of the weak current box in the middle room;

[0023] Figure 6 for Figure 1 Schematic diagram of the conductive connection structure of the monitoring security device in the middle room weak current box when connected to the cable;

[0024] Figure 7 for Figure 6 A cross-sectional view of the conductive connection structure of the monitoring and security device of the weak current box in the middle room;

[0025] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0026] Figure 9 for Figure 6 A diagram showing the motion state changes of the conductive connection structure of the weak current box monitoring security device in the middle room;

[0027] Figure 10 for Figure 9 A cross-sectional view of the conductive connection structure of the monitoring and security device of the weak current box in the middle room;

[0028] Figure 11 for Figure 10 A partial enlarged view of point C in the middle;

[0029] Figure 12 This is an axonometric view of the outer cylinder of the conductive connection structure of the indoor weak current box monitoring security device.

[0030] in:

[0031] 100, connector body; 101, inner tube; 102, outer tube; 103, center pin; 104, convex ring; 105, ring groove; 106, movable ring;

[0032] 200, cable; 201, shielding layer; 202, battery core; 203, foaming layer; 204, tinfoil layer; 205, skin layer;

[0033] 300, opening; 301, V-shaped bent plate; 302, curved plate. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0036] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] like Figures 1 to 12As shown, an embodiment of the present invention provides a conductive connection structure of an indoor weak current box monitoring security device, including a connector body 100 and an inner cylinder 101. The connector body 100 is connected to the end of a cable 200 through the inner cylinder 101. An outer cylinder 102 is slidably sleeved on the inner cylinder 101 and the cable 200. The cable 200 has a shielding layer 201. Before the inner cylinder 101 is connected to the end of the cable 200, the shielding layer 201 is in a first state folded along its axial direction. After the inner cylinder 101 is connected to the end of the cable 200, the outer cylinder 102 slides from the cable 200 to the inner cylinder 101, and the shielding layer 201 maintains the first state and enters between the outer cylinder 102 and the inner cylinder 101.

[0038] First, the outer cylinder 102 is put on the cable 200, and the surface layer 205 at the end of the cable 200 is removed, and the shielding layer 201 is folded along its axial direction away from the end of the cable 200, and then the inner cylinder 101 is connected to the end of the cable 200. In the process of the outer cylinder 102 sliding from the cable 200 to the inner cylinder 101, the outer cylinder 102 drives the shielding layer 201 to maintain a folded state and enter between the outer cylinder 102 and the inner cylinder 101, so as to connect the connector body 100 to the end of the cable 200 through the inner cylinder 101. The braided structure of the shielding layer 201 is loose and uniform in its circumferential direction. At the same time, the shielding layer 201 is in an axially folded state, so there is no need for a crimping process. Under the action of the outer cylinder 102, the internal circumferential deformation of the cable 200 is uniform, which improves the connection stability of the connector body 100 and reduces the possibility of loosening due to external interference.

[0039] Among them, see Figure 7 、 Figure 8 、 Figure 10 、 Figure 11 , the cable 200 comprises, from the inside to the outside, a battery core 202, a foam layer 203, a tin foil layer 204, a shielding layer 201 and a skin layer 205. The shielding layer 201 has a woven structure and is made of a highly conductive and flexible metal material, such as copper. The connector body 100 has a card slot locking structure to achieve quick plugging and unplugging and a secure connection to prevent accidental detachment. A knob is provided on the connector body 100 for easy rotation and plugging. A center pin 103 is provided in the connector body 100. One end of the center pin 103 has a connecting blind hole, which is connected to the battery core 202 when in use. The other end of the center pin 103 has a tapered needle head, which is plugged into the device to transmit signals when in use.

[0040] When the existing connector body 100 is used, the outer tube 102 is first sleeved on the end of the cable 200, and a certain length of the skin layer 205 is peeled off from the end of the cable 200 to turn out the shielding layer 201, so that the shielding layer 201 appears loose and messy. Then a certain length of the tin foil layer 204 and the foam layer 203 are peeled off to expose a certain length of the battery core 202, and the center pin 103 is placed on the exposed end of the battery core 202 through the connecting blind hole, and then the center pin 103 is crimped with a crimping pliers. The needle 103 is crimped to the end of the battery cell 202; the inner cylinder 101 of the connector body 100 is sleeved on the end of the cable 200, so that the turned-out shielding layer 201 is wrapped around the inner cylinder 101, and the outer cylinder 102 is slid from the cable 200 to the inner cylinder 101. At this time, the shielding layer 201 is squeezed between the outer cylinder 102 and the inner cylinder 101, and then the outer cylinder 102 is squeezed with a crimping pliers to perform the crimping process, thereby connecting the connector body 100 and the end of the cable 200.

[0041] In order to prevent the braided structure of the shielding layer 201 from becoming loose and disordered in the circumferential direction of the cable 200 after it is turned out, the conductive connection structure folds the shielding layer 201 along its axial direction, so that the shielding layer 201 produces regular changes in its circumferential direction when it is turned out. Figure 7 、 Figure 8 This means that the braided structure of shielding layer 201 is uniformly loose around the circumference, ensuring uniform circumferential stress on shielding layer 201. However, it's worth noting that the material of shielding layer 201 itself remains unchanged. To avoid the uneven circumferential deformation of cable 200 caused by conventional crimping, this conductive connection structure eliminates the need for crimping. Instead, the outer and inner barrels 102 and 101 cooperate to compress the axially folded shielding layer 201, achieving a secure connection between connector body 100 and cable 200.

[0042] The inner diameter of the outer barrel 102 can be larger than the outer diameter of the cable 200, while the outer diameter of the inner barrel 101 can be equal to that of the cable 200. One end of the inner barrel 101 is integrally formed with the connector body 100, and the other end of the inner barrel 101 defines a blind abutment hole. During use, after removing the outer layer 205, shielding layer 201, and tin foil layer 204, the end of the cable 200 is inserted into the blind abutment hole of the inner barrel 101. This allows the foam layer 203 of the cable 200 to abut against the interior of the blind abutment hole.

[0043] Preferably, a convex ring 104 is provided between the outer cylinder 102 and the inner cylinder 101 . After the outer cylinder 102 slides into the inner cylinder 101 , the convex ring 104 squeezes the shielding layer 201 .

[0044] The shielding layer 201 is squeezed by the protruding ring 104 to improve the fixing stability of the shielding layer 201 and prevent the shielding layer 201 from moving.

[0045] It is worth noting that the inner wall of the outer cylinder 102 and the outer wall of the inner cylinder 101 also exert an extrusion effect on the axially folded shielding layer 201 , but the extrusion effect on the shielding layer 201 at the convex ring 104 is more obvious, and the extrusion force is the largest.

[0046] The protruding ring 104 may also be a plurality of protrusions provided on the inner wall of the outer cylinder 102 or the outer wall of the inner cylinder 101 to press the shielding layer 201 .

[0047] Preferably, the protruding ring 104 is provided on the inner wall of the outer cylinder 102 .

[0048] The inner diameter of the protruding ring 104 may be greater than or equal to the outer diameter of the cable 200. The edge of the end surface of the protruding ring 104 is rounded.

[0049] As a structural variation of the present invention, the protruding ring 104 is provided on the outer wall of the inner cylinder 101 .

[0050] Preferably, a plurality of protruding rings 104 are arranged at equal intervals along the axial direction thereof to further enhance the fixing stability of the shielding layer 201 .

[0051] There are at least two, preferably three, protruding rings 104. The spacing and cross-sectional dimensions of the protruding rings 104 can be set selectively.

[0052] Preferably, an annular groove 105 is formed on the outer wall of the inner cylinder 101 . After the outer cylinder 102 slides into the inner cylinder 101 , the convex ring 104 squeezes the shielding layer 201 into the annular groove 105 to further enhance the fixing stability of the shielding layer 201 .

[0053] The cross-sectional dimension of the annular groove 105 is larger than the cross-sectional dimension of the convex ring 104 , so that the shielding layer 201 can be accommodated between the annular groove 105 and the convex ring 104 .

[0054] Preferably, it also includes a movable ring 106 whose diameter can be changed. Before the inner tube 101 is connected to the end of the cable 200, the movable ring 106 can clamp the shielding layer 201 and fold the shielding layer 201 along its axial direction. After the inner tube 101 is connected to the end of the cable 200, the shielding layer 201 can enter the annular groove 105 along with the movable ring 106.

[0055] After a certain length of the outer layer 205 is stripped from the end of the cable 200, the shielding layer 201 is exposed. The diameter of the movable ring 106 is increased, and the movable ring 106 is placed on the shielding layer 201 from the end of the cable 200. The diameter of the movable ring 106 is then reduced to clamp the shielding layer 201. The movable ring 106 is then pushed to fold the shielding layer 201 along its axial direction. The above steps are repeated until multiple movable rings 106 are placed on the shielding layer 201, with the spacing between adjacent movable rings 106 being the same. Accordingly, the shielding layer 201 is folded in a corrugated shape along its axial direction.

[0056] Connect the inner tube 101 to the end of the cable 200, starting from the end closest to the cable 200, and slide the movable ring 106 in the direction close to the connector body 100 in sequence. At the same time, the movable ring 106 maintains a clamping state on the shielding layer 201 until the movable ring 106 slides into the corresponding annular groove 105. The shielding layer 201 is also brought into the corresponding annular groove 105 by the movable ring 106. At this time, the shielding layer 201 is still in the first state of being folded along its axial direction.

[0057] Then push the outer cylinder 102 to slide from the cable 200 to the inner cylinder 101 until the convex ring 104 squeezes the corresponding movable ring 106 to reduce its diameter and passes over the movable ring 106. At this time, the convex ring 104 exerts an extrusion effect on the shielding layer 201, and the extrusion position is located on the side of the movable ring 106 close to the connector body 100 to prevent the outer cylinder 102 from moving along its axial direction, thereby achieving the connection between the connector body 100 and the end of the cable 200 through the inner cylinder 101.

[0058] When the movable ring 106 clamps the shielding layer 201, there is static friction between the two, so moving the movable ring 106 can cause the shielding layer 201 to move accordingly. Of course, the shielding layer 201 can also be manually pulled to facilitate its movement.

[0059] Of course, the movable ring 106 may not be provided, and the shielding layer 201 may be folded and moved manually along its axial direction.

[0060] Preferably, see Figure 2 The movable ring 106 has a notch formed in its circumference.

[0061] The movable ring 106 can be made of a metal material such as phosphor bronze, beryllium copper alloy, or stainless steel, but it is necessary to avoid affecting signal transmission. For example, the movable ring 106 should be electrically connected to the connector body 100 or the shielding layer 201 to ensure that they are at the same potential to avoid the formation of an additional loop; or the movable ring 106 should be ensured to only contact the shielding layer 201 and be insulated from the battery cell 202. Of course, the movable ring 106 can also be made of an engineering plastic such as nylon, which has good insulation properties. Of course, the movable ring 106 can also be made entirely of an elastic material to allow its diameter to change.

[0062] Preferably, see Figure 12 The outer cylinder 102 is cylindrical and has an opening 300 formed along its length. A connecting piece is provided at the opening 300 for locking the size of the opening 300.

[0063] The cable 200 and the shielding layer 201 are crimped together by the inner wall of the cylindrical outer cylinder 102 , so that the circumferential force is more uniform.

[0064] Among them, the connecting piece is a V-shaped bent plate 301, and the outer cylinder 102 is formed with two ends due to the opening 300. One end of the outer cylinder 102 is connected to the arc plate 302, and the arc plate 302 has the same diameter as the outer cylinder 102 and is concentrically arranged. The other end of the outer cylinder 102 is connected to one end of the V-shaped bent plate 301, and the other end of the V-shaped bent plate 301 is connected to the arc plate 302. The sum of the thickness of the two sections of the V-shaped bent plate 301 and the thickness of the arc plate 302 is equal to the thickness of the outer cylinder 102. After the aforementioned installation process, the outer tube 102 is crimped using the circular crimping hole of a special crimping pliers. The crimping pliers are operated to apply pressure to the wall of the outer tube 102, so that the V-shaped bending plate 301 is bent to a state where it overlaps with the arc plate 302. At this time, the outer tube 102 and the arc plate 302 together form a perfect circle, so that the extrusion force on the cable 200 and the shielding layer 201 in the circumferential direction is more uniform, thereby improving the connection stability of the connector body 100.

[0065] Among them, before crimping, the inner hole of the outer cylinder 102 is irregular, and its size is sufficient to enable the outer cylinder 102 to be sleeved on the cable 200. After crimping, that is, when the outer cylinder 102 forms a perfect circular inner hole, the diameter of the perfect circular inner hole is smaller than the outer diameter of the shielding layer 201 to achieve the crimping effect.

[0066] In the prior art, the outer tube 102 is squeezed by using a regular polygonal pressing hole of a crimping pliers. The number of sides of the regular polygonal pressing hole can also be increased to reduce the circumferential deformation difference generated inside the cable 200 .

[0067] Preferably, a plurality of openings 300 are provided at equal intervals along the circumference of the outer cylinder 102 to further make the extrusion force on the cable 200 and the shielding layer 201 in the circumferential direction more uniform.

[0068] When the present invention is used, the outer cylinder 102 is first sleeved on the end of the cable 200, and a certain length of the skin layer 205 is peeled off from the end of the cable 200 to expose the shielding layer 201. The movable ring 106 with an increased diameter is sleeved on the shielding layer 201 from the end of the cable 200, and then 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 its axial direction. The above steps are repeated to sleeve multiple movable rings 106 on the shielding layer 201 at equal intervals, so that the shielding layer 201 is folded in a corrugated shape along its axial direction, such as Figure 7 、 Figure 8 shown.

[0069] Peel off a certain length of the tin foil layer 204 and the foam layer 203 to expose a certain length of the battery core 202, and then use a crimping pliers to crimp the center pin 103 to the end of the battery core 202; put the inner tube 101 of the connector body 100 on the end of the cable 200, and start from the end closest to the cable 200, slide the movable ring 106 in the direction close to the connector body 100 in sequence, and at the same time, the movable ring 106 maintains the clamping 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 to the corresponding annular groove 105 by the movable ring 106. At this time, the shielding layer 201 is still in the first state of folding along its axial direction, that is, the shielding layer 201 in the first state is wrapped around the inner tube 101.

[0070] Then push the outer cylinder 102 to slide from the cable 200 to the inner cylinder 101 until the convex ring 104 squeezes the corresponding movable ring 106 to reduce its diameter and passes over the movable ring 106. Figure 10 、 Figure 11 As shown, at this time, the convex ring 104 exerts an extrusion effect on the shielding layer 201, and the extrusion position is located on the side of the movable ring 106 close to the connector body 100 to prevent the outer tube 102 from moving along its axial direction, thereby realizing the connection between the connector body 100 and the end of the cable 200 through the inner tube 101. The braided structure of the shielding layer 201 is loose and uniform in its circumferential direction. At the same time, the shielding layer 201 is in an axially folded state, so there is no need for a crimping process. Under the action of the outer tube 102, the internal circumferential deformation of the cable 200 is uniform, which improves the connection stability of the connector body 100 and reduces the possibility of loosening due to external interference.

[0071] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A conductive connection structure for an indoor weak current box monitoring security device, characterized in that: The cable is secured to the outer wall of the cable and secured to the outer wall of the cable. The cable is secured to the outer wall of the cable and secured to the outer wall of the cable. The cable is secured to the outer wall of the cable and secured to the outer wall of the cable. It also includes a movable ring whose diameter can be changed. Before the inner cylinder is connected to the end of the cable, the movable ring can clamp the shielding layer and push the movable ring to fold the shielding layer along its axial direction. After the inner cylinder is connected to the end of the cable, the shielding layer can enter the annular groove along with the movable ring.

2. The conductive connection structure of the indoor weak current box monitoring security device according to claim 1, characterized in that: The movable ring is formed with a notch in the circumference thereof.

3. The conductive connection structure of the indoor weak current box monitoring security device according to claim 1 or 2, characterized in that: The outer cylinder is cylindrical and has an opening formed along its length. A connecting piece is provided at the opening for locking the size of the opening.

4. The conductive connection structure of the indoor weak current box monitoring security device according to claim 3, characterized in that: A plurality of openings are arranged at equal intervals along the circumference of the outer cylinder.

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