Wire connecting mechanism in small sleeve

Abstract

The invention relates to the technical field of wire connection, in particular to a wire connection mechanism in a small sleeve. Comprising a connecting frame and wiring holes, the wiring holes are symmetrically formed in the connecting frame, the device further comprises a fixing device and an extension mechanism, the fixing device is installed in the wiring holes, and the fixing device locks and clamps a wire in the wiring holes through pressing and enables the wire to be electrically communicated with the wiring holes; the extension mechanism is installed in the connecting frame, and the extension mechanism achieves the extension of the whole wire connecting mechanism through a corrugated pipe and a locking device, so that the length and angle of the connecting mechanism can be adjusted more conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of wire connection, and in particular to a wire connection mechanism in a thin sleeve. Background Art

[0002] With the gradual development of society, various municipal improvements are also being gradually carried out. For example, many night scenes will appear in more and more places, which are inseparable from the connection of various lamps. The existing lamp connections usually require various wires for connection. In the process of connecting the wires, various lamps usually need to be connected in series. In the process of connecting the existing lamps in series, it is usually necessary to manually connect the wires in the two lamps and wrap them with tape. In some special environments, such as lighting installations on trees, due to the different shapes of branches, it is necessary to change the direction of the wires, which requires reserving the length of the wires at each position. However, the wire length reserved by manual estimation will cause the wire to be too long or too short. If the wire is too long, the wire will not fit the tree branches, causing the wire to hang and affect the appearance. If the wire is too short, it will be necessary to pre-connect a section of wire on the basis of the original wire, which will cause the entire installation process to become extremely cumbersome.

[0003] Therefore, the present invention designs a wire connection mechanism in a small sleeve to solve the above-mentioned technical problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is as follows: During the installation of lamps on existing trees, due to the different shapes of branches, the direction of the wire needs to be changed, which requires reserving the length of the wire at each position. However, manually estimating the reserved wire length may cause the wire to be too long or too short. If the wire is too long, the wire cannot fit the tree branches, causing the wire to hang and affect the appearance. If the wire is too short, it is necessary to pre-tie another section of wire on the basis of the original wire, which makes the entire installation process extremely cumbersome.

[0005] The present invention provides the following technical solution: a wire connecting mechanism in a thin sleeve, comprising a connecting frame and a wiring hole, wherein the connecting frame is symmetrically provided with the wiring holes, and further comprising a fixing device and an extension mechanism, wherein the fixing device is installed in the wiring hole, and the fixing device locks and clamps the wire in the wiring hole by pressing, and electrically connects the wire to the wiring hole; the extension mechanism is installed in the connecting frame, and the extension mechanism realizes the extension of the entire wire connecting mechanism through a bellows and a locking device, thereby making it more convenient to adjust the length and angle of the connecting mechanism.

[0006] Preferably, the fixing device includes a fixing groove, a fixing cover, a limiting mechanism, a conductive sheet, a telescopic rod and a pressure spring, the fixing groove is arranged in the wiring hole, the fixing groove is a hollow cylindrical shape and an internal thread is arranged in the fixing groove, the fixing cover is installed in the fixing groove and an external thread is arranged on the outside of the fixing cover, a circular hole is opened on the fixing cover, the limiting mechanism is installed in the fixing groove, a conductive sheet is installed at the end of the wiring hole, a telescopic rod is installed on one side of the conductive sheet, and a pressure spring is installed on the telescopic rod.

[0007] Preferably, the limiting mechanism includes a limiting hole, a limiting groove, a clamping lever, a clamping spring and a clamping block. The limiting hole is symmetrically arranged in the fixing groove, a limiting groove is installed at one end of the limiting hole, the clamping lever is installed in the limiting hole and the limiting groove, the clamping lever is located in the limiting groove and is sleeved with a clamping spring, and the clamping block is installed on the wire head.

[0008] Preferably, there are two clamping blocks and the clamping blocks are in a frustum shape; the two clamping blocks are symmetrically installed, and the clamping block located at the bottom can slide up and down, and a fixing ring is installed under the clamping block located at the bottom.

[0009] Preferably, the clamping blocking rod is a right-angled trapezoid.

[0010] Preferably, the extension mechanism includes a bellows, an extension line, a fixed sleeve and a locking device. A bellows is arranged in the middle position of the connecting frame, two connecting frames are connected between the bellows, and an extension line is installed in the bellows; a fixed sleeve is connected to the outer shell of the bellows, and the fixed sleeve is sleeved on one end of the wiring hole, and a locking device is installed in the wiring hole.

[0011] Preferably, the locking device includes a locking bracket, a locking block, a pressing block and an extrusion spring. The locking bracket is installed in the wiring hole, a locking block is installed at one end of the locking bracket, an extrusion spring is installed on the locking block, and a pressing block is installed at the other end of the locking bracket.

[0012] Preferably, the fixing sleeve is provided with a fixing hole, and the locking block is clamped in the fixing hole.

[0013] Preferably, a locking bracket protrusion is provided in the middle of the locking bracket, a sliding groove is provided on the wiring hole, a sliding block is installed in the sliding groove, and the sliding block is hinged to the locking bracket protrusion.

[0014] Preferably, an extrusion rod is installed in the sliding groove, a return spring is sleeved in the extrusion rod, and the extrusion rod is a right-angled trapezoidal body.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention provides a fixing device. By providing the fixing device, the wire can be installed in the connecting frame only by pressing, and the wire can be taken out by pressing again. In this way, the wire can be quickly installed and taken out, and the entire wire connection position is protected from damage to the greatest extent. At the same time, the extension device can be used to bend the connecting mechanism at the place where bifurcation or bending is required by opening the extension device, which protects the wire while also having a good conductive effect.

[0016] 2. The present invention provides an extension device and a locking device. When the connection direction of the wire needs to be changed or the reserved wire length is insufficient, the staff releases the lock of the locking device and pulls the fixed sleeve. The fixed sleeve drives the corrugated tube to unfold and stretch the corrugated tube. The stretching of the corrugated tube drives the extension line to stretch. At this time, the connection direction of the connecting mechanism can be changed, which is suitable for wire connection in any direction. This method can make the wire connection more flexible and the connection length of the wire with insufficient reserved line can be extended by the extension line, thereby realizing the modification within a small range without changing the original wire fixing method. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 is a schematic diagram of a fixing device of the present invention; Figure 3 It is a schematic diagram of the fixing device of the present invention when it is working; Figure 4 is a schematic diagram of a clamping block of the present invention; Figure 5 It is an enlarged view of point A of the present invention; Figure 6 It is an enlarged view of point B of the present invention; Figure 7 It is a schematic diagram of the position of the extension mechanism of the present invention; Figure 8 is a schematic diagram of the extension mechanism of the present invention; Fig. 9 It is a working principle diagram of the locking device of the present invention; Fig.10 It is a schematic diagram of the positions of the sliding block and the extrusion rod of the present invention; Fig.11 It is an enlarged view of point C of the present invention; Fig.12 It is a working schematic diagram of the sliding block and the extrusion rod of the present invention.

[0019] In the figure: 1. connecting frame; 2. wiring hole; 21. sliding groove; 22. sliding block; 23. extrusion rod; 24. reset spring; 3. fixing device; 31. fixing groove; 311. internal thread; 32. fixing cover; 321. external thread; 322. circular hole; 33. limiting mechanism; 331. limiting hole; 332. limiting groove; 333. clamping block; 334. clamping spring; 335. clamping block; 336. fixing ring; 34. conductive sheet; 35. telescopic rod; 36. pressure spring; 4. extension mechanism; 41. bellows; 42. extension line; 43. fixing sleeve; 431. fixing hole; 44. locking device; 441. locking bracket; 442. locking block; 443. pressing block; 444. extrusion spring. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. Such terms are only used to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0023] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The disclosed embodiment aims to solve the problem that during the installation of lamps on existing trees, the direction of the wire needs to be changed due to the different shapes of branches, which requires the length of the wire at each position to be reserved. However, the wire length reserved by artificial estimation will cause the wire to be too long or too short. If the wire is too long, the wire cannot fit the tree branches, causing the wire to hang and affect the appearance. If the wire is too short, it is necessary to pre-tie another section of wire on the basis of the original wire, which will cause the entire installation process to become extremely cumbersome. In view of this, the disclosed embodiment proposes a wire connection mechanism in a small sleeve. The mechanism can achieve the installation of the wire in the connection frame by only pressing by setting a fixing device, and the wire can be taken out by pressing again. In this way, the installation and removal of the wire can be quickly realized, and the entire wire connection position can be protected from damage to the maximum extent. At the same time, through the extension device, the connection mechanism can be bent by opening the extension device at the place where bifurcation or bending is required, which protects the wire while also having a good conductive effect.

[0025] like Figures 1 to 12 As shown, a wire connecting mechanism in a small sleeve includes a connecting frame 1 and a wiring hole 2, wherein the connecting frame 1 is symmetrically provided with the wiring hole 2, and further includes a fixing device 3 and an extension mechanism 4, wherein the fixing device 3 is installed in the wiring hole 2, and the fixing device 3 locks and clamps the wire in the wiring hole 2 by pressing, and makes the wire electrically connected to the wiring hole 2; the extension mechanism 4 is installed in the connecting frame 1, and the extension mechanism 4 extends the entire wire connecting mechanism through a bellows 41 and a locking device 44, so that the length and angle of the connecting mechanism can be adjusted more conveniently.

[0026] By setting up the fixing device 3, the wire can be installed in the connecting frame 1 only by pressing, and the wire can be taken out by pressing again. In this way, the wire can be quickly installed and taken out, and the entire wire connection position is protected from damage to the greatest extent. At the same time, through the extension device, the connection mechanism can be bent by opening the extension device at the place where bifurcation or bending is required, which protects the wire while also having a good conductive effect.

[0027] like Figures 1 to 6 As shown, the fixing device 3 includes a fixing groove 31, a fixing cover 32, a limiting mechanism 33, a conductive sheet 34, a telescopic rod 35 and a pressure spring 36. The fixing groove 31 is arranged in the wiring hole 2, and the fixing groove 31 is used to fix the fixing device 3 in the wiring hole 2; the fixing groove 31 is a hollow cylindrical shape and an internal thread 311 is arranged in the fixing groove 31, and the fixing groove 31 is used to fix the wire, and the fixing cover 32 is fixed to the fixing groove 31 by the internal and external threads 321; the fixing cover 32 is installed in the fixing groove 31 and the fixing cover 32 An external thread 321 is provided on the outside, and a circular hole 322 is opened on the fixing cover 32, and the circular hole 322 is used for allowing the wire to pass through and preliminarily fix the wire; the limiting mechanism 33 is installed in the fixing groove 31, and the limiting mechanism 33 is used to install a conductive sheet 34 according to the end of the wiring hole 2, and the conductive sheet 34 is used to energize the wire; a telescopic rod 35 is installed on one side of the conductive sheet 34, and the telescopic rod 35 is used to push the conductive sheet 34 to connect with the wire; a pressure spring 36 is installed on the telescopic rod 35, and the pressure spring 36 is used to provide the telescopic rod 35.

[0028] During operation, the staff first passes the wire through the circular hole 322 in the fixing cover 32 and continues to move it into the wiring hole 2. After the limiting mechanism 33 is clamped in the wiring hole 2, the wire contacts the conductive sheet 34, so that the wire is electrically connected to the connecting frame 1. At this time, the staff tightens the fixing cover 32 into the fixing groove 31 to complete the fixing of the wire.

[0029] The above-mentioned fixing device 3 can be used to quickly fix the wire, thereby avoiding the tedious process of manually connecting the wires in two lamps and wrapping them with tape during the existing series connection of lamps. At the same time, a telescopic rod 35 is arranged under the conductive sheet 34 to ensure that the wire can fully contact the conductive sheet 34, thereby ensuring the conductive effect.

[0030] like Figures 1 to 6As shown, the limiting mechanism 33 includes a limiting hole 331, a limiting groove 332, a clamping block 333, a clamping spring 334 and a clamping block 335. The limiting hole 331 is symmetrically arranged in the fixing groove 31, and the limiting hole 331 is used to limit the clamping block 333; a limiting groove 332 is installed at one end of the limiting hole 331, and the limiting groove 332 is used to fix the clamping spring 334 and provide a moving space for the clamping block 333; the clamping block 33 3 is installed in the limiting hole 331 and the limiting groove 332, and the clamping stopper 333 is used to clamp the clamping block 335, thereby fixing the wire; the clamping stopper 333 located in the limiting groove 332 is sleeved with a clamping spring 334, and the clamping spring 334 is used to reset the clamping block 335 when the clamping block 335 is not squeezed; the clamping block 335 is installed on the wire head, and the clamping block 335 is used to fix the wire with the clamping stopper 333.

[0031] During operation, the staff first fixes the clamping block 335 at the end of the wire. Usually, the clamping block 335 can be fixed to the end of the wire by setting a rubber ring in an array inside the clamping block 335. Then the wire drives the clamping block 335 to be inserted into the fixing groove 31. When the clamping block 335 contacts the clamping baffle 333, the clamping baffle 333 will move outward and squeeze the clamping spring 334. After the clamping block 335 passes, the clamping baffle 333 will reset under the action of the clamping spring 334. At this time, the clamping baffle 333 fixes the clamping block 335 in the fixing groove 31, thereby fixing the wire.

[0032] The design of the clamping block 335 and the clamping baffle 333 achieves the effect of fixing the wire only by pressing, replacing the existing manual fixing method, improving the wire fixing and installation efficiency, and at the same time, the connection between the wire and the conductive sheet 34 is arranged inside the fixing groove 31, making it less likely to be damaged.

[0033] like Figure 4As shown, there are two clamping blocks 335 and the clamping blocks 335 are in the shape of a cone; the two clamping blocks 335 are symmetrically installed, and the clamping block located at the bottom can slide up and down; a fixing ring 336 is installed below the clamping block 335 located at the bottom; the clamping blocking rod 333 is a right-angled trapezoid. Through the cooperation of the frustum design of the right-angled trapezoidal body and the frustum-shaped clamping block 335, the clamping baffle 333 will gradually move backwards when the clamping block 335 just contacts the clamping baffle 333. After the first clamping block 335 completely passes through the clamping baffle 333, the clamping baffle 333 contracts to complete the fixation of the clamping block 335. At the same time, when the wire needs to be taken out, it is only necessary to continue to push the wire. At this time, the wire squeezes the conductive sheet 34 to continue to move forward, and the second clamping block 335 continues to move forward, thereby causing the clamping baffle 333 to continue to move to both sides. After the second clamping block 335 completely passes through the clamping baffle 333, it is only necessary to pull the wire outwards to take it out.

[0034] like Figures 7 to 12 As shown, the extension mechanism 4 includes a bellows 41, an extension line 42, a fixed sleeve 43 and a locking device 44. The middle position of the connecting frame 1 is provided with a bellows 41, and the bellows 41 is used to cooperate with the staff to complete the bending or stretching of the connecting mechanism; the two connecting frames 1 are connected between the bellows 41, and the extension line 42 is installed in the bellows 41; the extension line 42 is used to cooperate with the bellows 41 to stretch or bend; the outer sleeve of the bellows 41 is connected with a fixed sleeve 43, and the fixed sleeve 43 is used to fix the extension mechanism 4 when the extension mechanism 4 is not applicable, and at the same time protect the bellows 41 and the extension line 42. The fixed sleeve 43 is sleeved on one end of the wiring hole 2, and a locking device 44 is installed in the wiring hole 2, and the locking device 44 is used to lock the fixed sleeve 43; During operation, when it is necessary to change the connection direction of the wire or the reserved wire length is insufficient, the staff will unlock the locking device 44 and pull the fixed sleeve 43. The fixed sleeve 43 drives the corrugated tube 41 to unfold and the corrugated tube 41 to stretch. The stretching of the corrugated tube 41 drives the extension line 42 to stretch. At this time, the connection direction of the connecting mechanism can be changed, which is suitable for wire connection in any direction. This method can make the wire connection more flexible and the connection length of the wire with insufficient reserved line can be extended by the extension line, thereby realizing the modification within a small range without changing the original wire fixing method.

[0035] like Figures 9 to 11As shown, the locking device 44 includes a locking bracket 441, a locking block 442, a pressing block 443 and an extrusion spring 444. The locking bracket 441 is installed in the wiring hole 2, and the locking bracket 441 is used to fix the locking device 44 on the connecting mechanism; a locking block 442 is installed at one end of the locking bracket 441, and the locking block 442 is used to fix the sleeve 43; an extrusion spring 444 is installed on the locking block 442, and the extrusion spring 444 fixes the fixed sleeve 43 by applying an extrusion force to the locking block 442; a pressing block 443 is installed at the other end of the locking bracket 441, and a fixing hole 431 is opened on the fixed sleeve 43, and the locking block 442 is clamped in the fixing hole 431; the pressing block 443 is used to release the fixation of the fixed sleeve 43 through the principle of leverage, that is, the locking block 442 is lifted from the fixing hole 431 in the fixed sleeve 43 by pressing the pressing block 443.

[0036] like Fig.11 As shown, a locking bracket 441 protruding end is provided in the middle of the locking bracket 441, and the locking bracket 441 protruding end is used to connect with the sliding block 22; a sliding groove 21 is provided on the wiring hole 2, and the sliding groove 21 is used for the sliding block 22 to slide; a sliding block 22 is installed in the sliding groove 21, and the sliding block 22 is used to slide outward under the push of the conductive sheet 34 to provide support for the protruding section; the sliding block 22 is hinged to the protruding end of the locking bracket 441, and the hinge is used to enable pressing the pressing block 443 to enable the locking block 442 in the locking bracket 441 to disengage the locking of the fixed sleeve 43.

[0037] like Figure 11 to Figure 12 As shown, an extrusion rod 23 is installed in the sliding groove 21, and the extrusion rod 23 is used to contract when it is squeezed by the conductive sheet 34, so that the extrusion rod 23 provides support for the sliding block 22, so that the sliding block 22 becomes the fulcrum of the lever mechanism of the locking device 44, so that the staff can press the block 443 to complete the release of the fixed sleeve; a reset spring 24 is sleeved in the extrusion rod 23, and the extrusion spring 444 is used to reset the extrusion rod 23 when the extrusion rod 23 is not squeezed, so that the sliding block 22 cannot provide support for the locking bracket 441, so that the locking block 442 is always fixed to the fixed sleeve under the action of the spring; the extrusion rod 23 is a right-angled trapezoid, and the right-angled trapezoid is used to receive the tilting force when the wire is squeezed, so that the extrusion rod 23 moves to both sides; when the wire contacts the right-angled side of the right-angled trapezoid, it is in a clamping state.

[0038] By adopting the design of the above-mentioned locking device 44 and the sliding groove 21, it can be achieved that the connecting mechanism can lock the fixed sleeve by pressing the pressing block 443 only when the wire is inserted. Therefore, when the connecting mechanism is not connected to the wire, the locking device 44 locks the fixed sleeve to provide protection for the extension mechanism 4. At this time, the connecting mechanism is a rigid body. When the wire is inserted, the fixing of the fixed sleeve can be released by pressing the pressing block 443, thereby forming a self-locking mechanism, that is, the extension mechanism 4 can only be used when the wire is inserted into the wiring hole 2 and contacts the conductive sheet 34, thereby further avoiding unnecessary damage to the extension mechanism 4 when the wire is not inserted.

[0039] The overall working process is as follows: the staff first fixes the clamping block 335 at the end position of the wire, usually by setting a rubber ring in an array inside the clamping block 335 to fix the clamping block 335 at the end of the wire, and then drives the clamping block 335 into the fixing groove 31 with the wire, and when the clamping block 335 contacts the clamping baffle 333, the clamping baffle 333 will move outward and squeeze the clamping spring 334. After the clamping block 335 passes, the clamping baffle 333 will reset under the action of the clamping spring 334. At this time, the clamping baffle 333 fixes the clamping block 335 in the fixing groove 31, thereby fixing the wire. This is a normal installation process.

[0040] When the connection direction of the wire needs to be changed, at this time, only the wire is inserted into the connection mechanism, and the conductive sheet 34 drives the sliding block 22 in the locking device 44 to move to both sides, so that the sliding block 22 becomes the fulcrum of the lever mechanism of the locking device 44. At this time, the staff only needs to press the pressing block 443 to lift the locking block 442 from the fixing hole 431 in the fixing sleeve 43 to release the lock of the fixing sleeve, and pull the fixing sleeve 43. The fixing sleeve 43 drives the bellows 41 to unfold and the bellows 41 to stretch. The stretching of the bellows 41 drives the extension line 42 to stretch. At this time, the connection direction of the connection mechanism can be changed, which is suitable for wire connection in any direction. This method can make the wire connection more flexible and the connection length of the wire with insufficient reserved lines can be extended by extension lines, thereby realizing a small range of modification without changing the original wire fixing method.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A wire connection mechanism in a small casing, comprising a connection frame (1) and a wiring hole (2), wherein the connection frame (1) is symmetrically provided with the wiring hole (2), characterized in that It also comprises a fixing device (3) and an extension mechanism (4), wherein the fixing device (3) is installed in the wiring hole (2), and the fixing device (3) locks and clamps the wire in the wiring hole (2) by pressing, and makes the wire electrically connected to the wiring hole (2); the extension mechanism (4) is installed in the connecting frame (1), and the extension mechanism (4) extends the entire wire connecting mechanism through the bellows (41) and the locking device (44), thereby making it more convenient to adjust the length and angle of the connecting mechanism.

2. A wire connection mechanism in a small casing according to claim 1, characterized in that: The fixing device (3) comprises a fixing groove (31), a fixing cover (32), a limiting mechanism (33), a conductive sheet (34), a telescopic rod (35) and a pressure spring (36); the fixing groove (31) is arranged in the wiring hole (2); the fixing groove (31) is hollow cylindrical and an internal thread (311) is arranged in the fixing groove (31); the fixing cover (32) is installed in the fixing groove (31) and an external thread (321) is arranged on the outside of the fixing cover (32); a circular hole (322) is opened on the fixing cover (32); the limiting mechanism (33) is installed in the fixing groove (31); a conductive sheet (34) is installed at the end of the wiring hole (2); a telescopic rod (35) is installed on one side of the conductive sheet (34); and a pressure spring (36) is installed on the telescopic rod (35).

3. A wire connection mechanism in a small casing according to claim 2, characterized in that: The limiting mechanism (33) comprises a limiting hole (331), a limiting groove (332), a clamping stop rod (333), a clamping spring (334) and a clamping block (335); the limiting hole (331) is symmetrically arranged in the fixing groove (31); one end of the limiting hole (331) is provided with the limiting groove (332); the clamping stop rod (333) is installed in the limiting hole (331) and the limiting groove (332); the clamping stop rod (333) is sleeved with a clamping spring (334) at the part of the clamping stop rod (333) located in the limiting groove (332); and the clamping block (335) is installed on the lead wire head.

4. A wire connection mechanism in a small casing according to claim 3, characterized in that: There are two clamping blocks (335) and the clamping blocks (335) are in a frustum shape; the two clamping blocks (335) are symmetrically installed, and the clamping block (335) located at the bottom can slide up and down, and a fixing ring (336) is installed below the clamping block (335) located at the bottom.

5. A wire connection mechanism in a small casing according to claim 4, characterized in that: The clamping blocking rod (333) is a right-angled trapezoidal body.

6. A wire connection mechanism in a small casing according to claim 5, characterized in that: The extension mechanism (4) comprises a bellows (41), an extension line (42), a fixed sleeve (43) and a locking device (44); a bellows (41) is arranged in the middle of the connecting frame (1); two connecting frames (1) are connected between the bellows (41); an extension line (42) is installed in the bellows (41); a fixed sleeve (43) is connected to the outer surface of the bellows (41); the fixed sleeve (43) is sleeved on one end of the wiring hole (2); and a locking device (44) is installed in the wiring hole (2).

7. A wire connection mechanism in a small casing according to claim 6, characterized in that: The locking device (44) comprises a locking bracket (441), a locking block (442), a pressing block (443) and a pressing spring (444); the locking bracket (441) is installed in the wiring hole (2); one end of the locking bracket (441) is installed with a locking block (442); the locking block (442) is installed with a pressing spring (444); and the other end of the locking bracket (441) is installed with a pressing block (443).

8. A wire connection mechanism in a small casing according to claim 7, characterized in that: The fixing sleeve (43) is provided with a fixing hole (431), and the locking block (442) is clamped in the fixing hole (431).

9. A wire connection mechanism in a small casing according to claim 8, characterized in that: A protruding end is provided in the middle of the locking bracket (441), a sliding groove (21) is provided on the wiring hole (2), a sliding block (22) is installed in the sliding groove (21), and the sliding block (22) is hinged to the protruding end of the locking bracket (441).

10. A wire connection mechanism in a small casing according to claim 9, characterized in that: An extrusion rod (23) is installed in the sliding groove (21), a return spring (24) is sleeved in the extrusion rod (23), and the extrusion rod (23) is a right-angled trapezoidal body.

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