CN214849203U - Split type contact pin - Google Patents

Abstract

The utility model discloses a split type contact pin, which comprises a jack and a pin sleeve, wherein a contact element is arranged in the jack, and a reducing bundle element is sleeved outside the contact element; one end of the needle sleeve is inserted into the jack, and the outer wall of the needle sleeve is pressed against the inner wall of the contact element. The utility model provides a split type contact pin, when the needle sleeve is inserted into the jack, the needle sleeve extrudes the inner wall of the contact element to deform, at the moment, the inner diameter of the contact element is increased, and the stress of the reducing bundle element is expanded; contact self restoring force orders about self shrink and presss from both sides tight needle cover, and reducing restraints self restoring force superposes on the contact simultaneously, promotes the fastness of centre gripping needle cover. The contact and the reducing beam overlapping clamping mode prolong the service life of the high-stability electric connection, and remarkably prolong the service life of the contact pin.

Description

Split type contact pin

Technical Field

The utility model relates to a charging connector technical field especially relates to a split type contact pin.

Background

At present, a common electric automobile high-current connecting pin on the market generally comprises a pin contact part and a jack used for wrapping the pin contact part (a needle head or a needle sleeve), a contact element is arranged inside the jack, the contact part is inserted into the jack and fixed, and the contact part is conducted with the contact element to realize electric connection. Wherein the other end of the jack is fixedly connected with the cable inside the plug.

Since the high-current connector used in the electric vehicle needs to have high-current load and durability, the conductivity, yield strength, and hardness (determining the wear resistance) of any material do not satisfy all requirements at the same time, and there is an upper limit in various material data. Therefore, after long-term use, the following problems occur: the effective conductive sectional area is reduced due to the abrasion of the jack contact piece (between the contact part and the contact piece) and the self plastic deformation; the main factors associated with the contact resistance R (Ω) are: a. effective conductor conducting distance L (m), b resistivity p (omega mm) of conductor²Effective conductive cross section area A (mm) of conductor²)。

The corresponding principle expression is as follows:

therefore, under the condition that other parameters are not changed, the effective conductive sectional area A is reduced, and the corresponding contact resistance R is relatively larger. When switching on heavy current, can produce great internal energy, lead to charging promptly and generate heat the rifle that causes and stop to fill or even relevant device or whole car burn out, so simple switching jack contact structure or adjustment jack contact material are difficult to satisfy the user to the long-time reliability of using of contact pin to and the demand of security.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a split type contact pin, it is long when the use of extension high stable electricity is connected.

The utility model discloses a split type contact pin adopts technical scheme is:

a split type contact pin comprises a jack and a pin sleeve, wherein a contact element is arranged in the jack, and a reducing bundle element is sleeved outside the contact element; one end of the needle sleeve is inserted into the jack, and the outer wall of the needle sleeve is in contact with the inner wall of the contact element.

As a preferred scheme, one end of the jack is provided with a fixing hole; the connecting piece is attached to the outer wall of one end of the jack, and a through hole is formed in one end of the connecting piece; the locking piece sequentially penetrates through the through hole and the fixing hole and is in contact with the needle sleeve; the fastening screw rod penetrates through the needle sleeve and is connected with the locking piece in a matched mode.

Preferably, the aperture of the through hole is larger than that of the fixed hole; the locking part is of a three-layer annular table structure, a first layer and a second layer of the locking part are respectively embedded into the fixing hole and the through hole, the end face of the third layer of the locking part is in contact with the connecting part, the locking part is of a hollow structure, and the inner wall of the locking part is provided with an internal thread; the thread part of the fastening screw is screwed into the locking piece for internal thread fixation, and the nut part of the fastening screw and the third layer end face of the locking piece clamp the bottom of the jack and are locked by the connecting piece.

According to a preferable scheme, the jack comprises a contact element, a reducing binding element and a first clamping cover, the contact element is a leaf spring, the leaf spring comprises a base and a plurality of elastic sheets, the fixing hole is arranged on a central axis of the base, the elastic sheets are vertically distributed around the base to form a containing groove, one end of the needle sleeve is arranged in the containing groove, an outward-protruding clamping block is arranged at the end part of each elastic sheet, each elastic sheet is provided with an inward-concave notch, the notches form an annular groove, and the annular groove is close to the clamping block; the reducing bundle is tightly sleeved in the annular groove; first card lid is hollow structure, fixed chamber has been seted up to first card lid one end inner wall, first card lid is located on the leaf spring, the fixed intracavity of fixture block card income is fixed, first card lid other end inner wall card is gone into in the ring channel.

Preferably, the connector is one of a bonding wire connector or a pressing wire connector.

Preferably, the reducing member is one of a flat spring and a clockwork spring.

As a preferred scheme, the jack comprises a hole sleeve, a contact element, a reducing binding element and a second clamping cover, wherein an annular table is arranged on the inner wall of one end of the hole sleeve, a sinking groove is formed in the middle of the annular table, and the fixing hole is arranged on the axis of the sinking groove; the contact element is a torsion spring which is of a cylindrical structure, an inward-concave waist part is arranged in the middle of the torsion spring, the torsion spring is inserted into the hole sleeve, and one end of the torsion spring is in contact with the annular table; the reducing binding piece is tightly sleeved outside the waist-contracting part; the second card lid is hollow structure, the second card lid is located on the borehole jack other end, the second card lid top touches the torsional spring other end.

Preferably, the connector is one of a bonding wire connector or a pressing wire connector.

Preferably, the reducing member is one of a flat spring and a clockwork spring.

Preferably, the reducing bundle is a profile structure.

The utility model discloses a split type contact pin's beneficial effect is: one end of the jack is provided with a fixing hole, a contact element is arranged inside the jack, and a reducing bundle element is sleeved outside the contact element. One end of the needle sleeve is inserted into the jack, and the outer wall of the needle sleeve is pressed against the inner wall of the contact element. When the needle sleeve is inserted into the jack, the needle sleeve extrudes the inner wall of the contact element to deform, the inner diameter of the contact element is increased at the moment, and the diameter-variable beam element is expanded under stress; contact self restoring force orders about self shrink and presss from both sides tight needle cover, and reducing restraints self restoring force superposes on the contact simultaneously, promotes the fastness of centre gripping needle cover. The contact and the reducing beam overlapping clamping mode prolong the service life of the high-stability electric connection, and remarkably prolong the service life of the contact pin.

Drawings

Fig. 1 is a schematic structural diagram of a split type contact pin using a leaf spring structure according to an embodiment of the present invention.

Fig. 2 is an exploded schematic view of a split type contact pin using a leaf spring structure according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a first view angle of a split pin and leaf spring according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a second view angle of a split pin and leaf spring according to an embodiment of the present invention.

Fig. 5 is a schematic structural view of a split type pin clockwork spring according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a first card cover of a split type pin according to an embodiment of the present invention.

Fig. 7 is a schematic structural view of a split type pin locking member according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a split pin wire type connector according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of a split-type pin-pressing connection component according to an embodiment of the present invention.

Fig. 10 is a cross-sectional view of a split type pin (flat spring) using a leaf spring structure according to an embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a split type pin clockwork spring according to an embodiment of the present invention.

Fig. 12 is a cross-sectional view of a split type pin (clockwork spring) using a leaf spring structure according to another embodiment of the present invention.

Fig. 13 is a schematic structural diagram of a split type pin using a torsion spring structure according to another embodiment of the present invention.

Fig. 14 is an exploded schematic view of a split type pin using a torsion spring structure according to another embodiment of the present invention.

Fig. 15 is a schematic structural view of three split pin sleeves according to embodiments of the present invention.

Fig. 16 is a schematic structural view of a second card cover of a split type pin according to three embodiments of the present invention.

Fig. 17 is a cross-sectional view of a split type pin (flat spring) using a torsion spring structure according to another embodiment of the present invention.

Fig. 18 is a schematic structural view of a four-part type contact pin profiling flat spring according to an embodiment of the present invention.

Fig. 19 is a cross-sectional view of a split type pin (profiling flat spring) using a torsion spring structure according to another embodiment of the present invention.

Fig. 20 is a cross-sectional view of a fifth split type pin (clockwork spring) using a torsion spring structure according to an embodiment of the present invention.

Fig. 21 is a schematic structural view of six split type insertion pin copying clockwork spring according to the embodiment of the present invention.

Fig. 22 is a cross-sectional view of six split pins (copying clockwork spring) using a torsion spring structure according to an embodiment of the present invention.

Detailed Description

The invention will be further elucidated and described with reference to the following embodiments and drawings in which:

the first embodiment is as follows:

referring to fig. 1 and 2, a split type insert pin includes a receptacle 10a, a needle sheath 40, a connector 50a, a locker 61, and a fastening screw 62.

Referring to fig. 2, 5 and 10, the socket 10a of the present embodiment is a leaf spring type socket 10a, and the socket 10a includes a contact, a diameter-changing member 20 and a first cap 30 a. In this embodiment, the contact member is a leaf spring 11, and the diameter-changing member 20 is a flat spring 20 a.

Referring to fig. 2-6, the leaf spring 11 includes a base 111 and a plurality of resilient pieces 112. The middle of the base 111 is provided with a fixing hole 12, a plurality of elastic sheets 112 are vertically arranged around the base 111 to form a containing groove 114, and the fixing hole 12 is arranged on the axis of the containing groove 114. The end of the elastic sheet 112 is provided with a first convex block 1121, the elastic sheet 112 is provided with an inner concave notch 1122, the plurality of notches 1122 form an annular groove 113, the annular groove 113 is close to the first block 1121, the flat spring 20a is tightly sleeved in the annular groove 113, the number of turns of the flat spring 20a in this embodiment ranges from 2 to 5 turns, the unwinding force in the range is in a better state, and the number of turns is prevented from being too many, so that deformation is generated in the assembling and inserting process, and subsequent normal use is influenced. The first card cover 30a is a hollow structure, a fixing cavity 31 is formed in an inner wall of one end of the first card cover 30a, the first card cover 30a covers the leaf spring 11, the first clamping block 1121 is clamped into the fixing cavity 31 for fixing, and an inner wall of the other end of the first card cover 30a is clamped into the annular groove 113.

Preferably, the side wall of the first clamping cover 30a is provided with a plurality of slits 32, and when the first clamping cover 30a is pressed to cover the leaf spring 11, the deformation occurs, the caliber is enlarged, and the assembly difficulty is reduced.

The needle sheath 40 is a highly conductive cylinder, one end of the needle sheath 40 is inserted into the containing groove 114, and the outer wall of the needle sheath 40 is pressed against the inner wall of the leaf spring 11.

When the needle sheath 40 is inserted into the containing groove 114 of the jack 10a, the needle sheath 40 presses the inner wall of the leaf spring 11 to deform, at the moment, the inner diameter of the end part of the leaf spring 11 is increased, and the flat spring 20a is forced to unwind and expand the caliber; the elastic sheet 112 of the leaf spring 11 drives the end portion to contract and clamp the needle sleeve 40 by self restoring force, and meanwhile, the flat spring 20a is overlapped on the annular groove 113 of the leaf spring 11 by self restoring force, so that the end portion of the leaf spring 11 further contracts the caliber, and the firmness of clamping the needle sleeve 40 is improved. The way that leaf spring 11 and flat spring 20a stack centre gripping will prolong its high stable electricity long-term of service that connects, show life that promotes.

In this embodiment, the leaf spring 11, the flat spring 20a and the needle sleeve 40 are made of a highly conductive material, preferably high beryllium copper, and the parts made of the material have the advantages of ensuring the requirement of high conductivity and good insertion and extraction performance.

The connecting piece 50a is attached to the outer wall of one end of the leaf spring 11, one end of the connecting piece 50a is provided with a through hole 51, and the other end of the connecting piece 50a is connected with the conductive part of the charging connector, so that a complete electric path can be realized.

Referring to fig. 7, the locker 61 passes through the through hole 51 and the fixing hole 12 in sequence and contacts the needle hub 40. The fastening screw 62 is connected with the retaining member 61 through the needle sleeve 40.

When the leaf spring 11 and the flat spring 20a are damaged and fail, the fastening screw 62 is only required to be disassembled and taken out from the accommodating groove 114, then the needle sleeve 40 is taken out, and finally the leaf spring 11 and the flat spring 20a are correspondingly replaced to complete the maintenance of the inserting needle, so that the operation is convenient, and the maintenance cost can be reduced.

Preferably, the aperture of the through hole 51 is larger than that of the fixing hole 12. Retaining member 61 is three-layer annular platform structure, and in retaining hole 12 and through-hole 51 were inlayed respectively to the first layer and the second floor of retaining member 61, the third layer terminal surface top of retaining member 61 touched connecting piece 50a, utilized the inlay location of retaining member 61 external structure, avoided leaf spring 11, connecting piece 50a to rock the skew after making the coaxial fixed of components of a whole that can function independently structure, guaranteed abundant contact to stabilize the heavy current transmission state. Retaining member 61 is hollow structure, and the retaining member 61 inner wall is equipped with the internal thread. The thread part of the fastening screw 62 is screwed into the internal thread of the locking member 61 for fixation, and the nut part of the fastening screw 62 and the third layer end face of the locking member 61 clamp the base 111 of the leaf spring 11 and are locked with the connecting member 50 a.

In the embodiment, the fastening screw 62 is made of high-temperature-resistant engineering plastics by an injection molding process, and the electric shock phenomenon caused by the mistaken touch of hands or conductive parts is prevented by utilizing the non-conductive property of the fastening screw. The nut portion of the fastening screw 62 is an arc-shaped table structure, which can provide a guiding function.

Preferably, a waterproof rubber ring 63 is disposed between the nut portion of the fastening screw 62 and the other end of the needle sleeve 40, so as to improve the sealing performance between the needle sleeve 40 and the nut portion of the fastening screw 62. Meanwhile, the inner and outer walls of the first card cover 30a are provided with sealing ribs 33, wherein the sealing ribs 33 on the inner wall of the first card cover 30a are used for improving the sealing performance between the first card cover 30a and the needle sleeve 40; the sealing rib 33 of the outer wall of the first card cover 30a serves to improve the sealability between the first card cover 30a and the charging plug receiving hole. With three above-mentioned three seal structure, can prevent effectively that outside liquid from getting into contact pin inside influence electrical connection.

Referring to fig. 8 and 9, in the present embodiment, the connecting element 50a is preferably a wire-bonding connecting element 50a, and may be replaced by a wire-pressing connecting element 50 b. The user may use the bonding wire plate 52 of the bonding wire connector 50a to be fixed to the conductive end of the charging plug by welding, or the pressing wire fin 53 of the pressing wire connector 50b to be fixed to the conductive end of the charging plug by crimping, as required. Diversified connection modes can improve market competitiveness.

Example two:

referring to fig. 11 and 12, in the present embodiment, the flat spring 20a is replaced by the spring 20b, which has the function of generating driving force for reducing diameter, and can be perfectly applied to the annular groove 113. The optimum number of turns of the power spring 20b of this embodiment ranges from 2 to 4 turns.

Example three:

referring to fig. 13, 14 and 17, in the present embodiment, the jack 10a is replaced by a torsion spring type jack 10b based on the first embodiment, and the jack 10b includes a sleeve 13, a contact member, a diameter-changing member 20 and a second snap cover 30 b. The contact member of the present embodiment is a torsion spring structure, and the diameter-changing member 20 is a flat spring 20 a.

Referring to fig. 15, an annular table 131 is disposed on an inner wall of one end of the hole sleeve 13, a sinking groove 132 is disposed in a middle portion of the annular table 131, and a fixing hole 12 is disposed in a center of the sinking groove 132. The outer wall of the other end of the hole sleeve 13 is provided with an annular clamping groove 133.

The torsion spring 14 is a cylinder structure, and the middle part of the torsion spring 14 is provided with an inward concave waist part. Specifically, the torsion spring 14 is a sheet metal structure in the initial stage, and a plurality of grids 141 are punched in the middle of the sheet metal through a punching process; randomly curling into a grid cylinder; finally, torsion springs 14 are formed at two ends of the grid cylinder in a twisting mode. When both ends of the torsion spring 14 are twisted, the bars are kept in a linear state (the whole bars are kept in a linear state except for slight twist), and therefore the plurality of bars 141 are wound to form a waisted structure. The torsion spring 14 is inserted into the hole sleeve 13, and one end of the torsion spring 14 is pressed against the annular table 131.

The flat spring 20a is tightly sleeved outside the waist-contracting portion.

Referring to fig. 16, the second cover 30b is a hollow structure, the second cover 30b has a ring-shaped hook 34, the ring-shaped hook 34 is fixed in the ring-shaped slot 133, and the second cover 30b contacts the other end of the torsion spring 14.

The needle sleeve 40 is inserted into the sinking groove 132 of the hole sleeve 13 and fixed, the needle sleeve 40 extrudes the torsion spring 14 to shrink the waist part to deform, at the moment, the inner diameter of the waist part is increased, and the flat spring 20a is forced to unwind and expand the caliber; the self restoring force of the waist-contracting part of the torsion spring 14 drives the end part of the torsion spring to contract and clamp the needle sleeve 40, and meanwhile, the self restoring force of the flat spring 20a is superposed on the torsion spring 14, so that the end part of the leaf spring 11 further contracts the caliber, and the firmness of the clamping needle sleeve 40 is improved. The way of overlapping and clamping the torsion spring 14 and the flat spring 20a prolongs the service life of the high-stability electric connection, and obviously prolongs the service life.

In this embodiment, the hole sleeve 13, the torsion spring 14, the flat spring 20a and the needle sleeve 40 are made of a high-conductivity material, preferably high beryllium copper, and the parts made of the material have the advantages of ensuring the requirement of high conductivity and good insertion and extraction performance.

When the torsion spring 14 and the flat spring 20a are damaged and fail, the fastening screw 62 is disassembled and taken out from the interior of the sinking groove 132, then the needle sleeve 40 is taken out, and finally the torsion spring 14 and the flat spring 20a are correspondingly replaced to complete the maintenance of the inserting needle, so that the operation is convenient and fast, and meanwhile, the maintenance cost can be reduced.

A plurality of second latches 1311 are provided on the annular table 131. The two ends of the torsion spring 14 are respectively provided with a plurality of bayonets 142, the bayonets 142 at the two ends of the torsion spring 14 are symmetrical to each other, and the second clamping blocks 1311 are clamped into the bayonets 142 at one end of the torsion spring 14 for fixation. The second clamping cover 30b is provided with a limit inner ring wall 35, the annular clamping hook 34 and the limit inner ring wall 35 are arranged on the same side of the second clamping cover 30b, the limit inner ring wall 35 is an inner ring, and the annular clamping hook 34 forms an outer ring. The outer wall of the limiting inner ring wall 35 is provided with a third clamping block 351, and the third clamping blocks 351 are clamped into the clamping holes 142 at the other end of the torsion spring 14 to be fixed. When the second clamping cover 30b is covered on the hole sleeve 13, the outer ring annular clamping hook 34 is clamped in the annular clamping groove 133 for fixation, the inner limiting ring wall 35 of the inner ring is inserted into the torsion spring 14, the end part of the torsion spring 14 is firmly pressed towards the inner wall of the hole sleeve 13, and the stability of electrical contact of the two is improved. The torsion spring 14 is locked inside the hole sleeve 13 by the second clamping block 1311 and the third clamping block 351, so that the torsion spring 14 is prevented from deflecting when the needle sleeve 40 is inserted, and the stability in the charging process is improved.

Example four:

in the present embodiment, the flat spring 20a is designed as a profiling flat spring 20c which is waisted according to the waisted structure of the torsion spring 14 on the basis of the third embodiment, please refer to fig. 18 and 19. The profiling flat spring 20c is more attached to the outer wall of the waist of the torsion spring 14, the acting area is increased, the wrapping force of the profiling flat spring 20c is improved, and the action effect of the profiling flat spring 20c can be further enhanced.

Example five:

referring to fig. 11 and 20, in the present embodiment, the flat spring 20a is replaced by the spring 20b based on the third embodiment, and the function of the flat spring is to generate the driving force for reducing, which can be perfectly applied to the waist-contracting portion of the torsion spring 14. The optimum number of turns of the power spring 20b of this embodiment ranges from 2 to 4 turns.

Example six:

in the present embodiment, the power spring 20b is designed as a profile power spring 20d that is waisted according to the waisted structure of the torsion spring 14 based on the fifth embodiment, please refer to fig. 21 and 22. The profiling clockwork spring 20d is more attached to the outer wall of the waist of the torsion spring 14, the acting area is increased, the wrapping force of the profiling clockwork spring 20d is improved, and the action effect of the profiling clockwork spring 20d can be further enhanced.

Example seven:

in the embodiment, the threaded connection structure of the locking member 61 and the fastening screw 62 is replaced by a buckle structure on the basis of the first embodiment, so that the locking and fixing structure is enriched, and the application of a user in different scenes is facilitated.

Example eight:

in the embodiment, the spring 20b is replaced by the C-shaped clamping piece or the sheet metal part with the round-covered stamping part on the basis of the second embodiment and the fifth embodiment, so that certain binding effects can be achieved on the leaf spring 11 and the torsion spring 14 of the two embodiments respectively, meanwhile, the production cost of the two embodiments can be reduced, and further the market competitiveness can be improved.

Example nine:

in the present embodiment, the detachable structure is replaced with the fixed connection structure on the basis of the first embodiment and the third embodiment. That is, in the first embodiment, the end of the leaf spring 11 is fixedly connected with the inner bottom of the charging plug by welding, or in the third embodiment, the end of the hole sleeve 13 is fixedly connected with the inner bottom of the charging plug by welding. The user can replace the welding form according to the requirement, and the ultrasonic welding is preferred in the embodiment.

The utility model provides a split type contact pin, jack one end are equipped with the fixed orifices, and the jack is inside to be equipped with the contact, and the outside cover of contact is equipped with the reducing and restraints the piece. One end of the needle sleeve is inserted into the jack, and the outer wall of the needle sleeve is pressed against the inner wall of the contact element. When the needle sleeve is inserted into the jack, the needle sleeve extrudes the inner wall of the contact element to deform, the inner diameter of the contact element is increased at the moment, and the diameter-variable beam element is expanded under stress; contact self restoring force orders about self shrink and presss from both sides tight needle cover, and reducing restraints self restoring force superposes on the contact simultaneously, promotes the fastness of centre gripping needle cover. The contact and the reducing beam overlapping clamping mode prolong the service life of the high-stability electric connection, and remarkably prolong the service life of the contact pin.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A split type contact pin is characterized by comprising a jack, wherein one end of the jack is provided with a fixing hole, a contact element is arranged inside the jack, and a diameter-changing binding element is sleeved outside the contact element;

one end of the needle sleeve is inserted into the insertion hole, and the outer wall of the needle sleeve is in contact with the inner wall of the contact piece.

2. The split type contact pin as claimed in claim 1, further comprising a connector attached to an outer wall of one end of the insertion hole, wherein one end of the connector is provided with a through hole;

the locking piece sequentially penetrates through the through hole and the fixing hole and is in contact with the needle sleeve;

and the fastening screw rod penetrates through the needle sleeve and is connected with the locking piece in a matching way.

3. The split pin of claim 2, wherein the through hole has a larger diameter than the fixing hole;

the locking part is of a three-layer annular table structure, a first layer and a second layer of the locking part are respectively embedded into the fixing hole and the through hole, the end face of the third layer of the locking part is in contact with the connecting part, the locking part is of a hollow structure, and the inner wall of the locking part is provided with an internal thread;

the thread part of the fastening screw is screwed into the locking piece for internal thread fixation, and the nut part of the fastening screw and the third layer end face of the locking piece clamp the bottom of the jack and are locked by the connecting piece.

4. The split type contact pin according to any one of claims 2 or 3, wherein the insertion hole comprises a contact member, the contact member is a leaf spring, the leaf spring comprises a base and a plurality of elastic sheets, the fixing hole is arranged on a central axis of the base, the plurality of elastic sheets are vertically arranged around the base to form a containing groove, one end of the needle sleeve is arranged in the containing groove, a convex clamping block is arranged at the end part of the elastic sheet, the elastic sheet is provided with an inner concave notch, the notches form an annular groove, and the annular groove is close to the clamping block;

the reducing bundle piece is tightly sleeved in the annular groove;

the first clamping cover is of a hollow structure, a fixed cavity is formed in the inner wall of one end of the first clamping cover, the first clamping cover is arranged on the leaf spring, the clamping block is clamped into the fixed cavity to be fixed, and the inner wall of the other end of the first clamping cover is clamped into the annular groove.

5. A split pin as defined in claim 4, wherein said connector is one of a wire bond connector or a wire crimp connector.

6. A split pin as claimed in claim 5, wherein the reducing collar is one of a flat spring or a clockwork spring.

7. A split type contact pin according to any one of claims 2 or 3, wherein the insertion hole comprises a hole sleeve, an annular table is arranged on the inner wall of one end of the hole sleeve, a sunken groove is formed in the middle of the annular table, and the fixing hole is arranged on the central axis of the sunken groove;

the contact element is a torsion spring which is of a cylindrical structure, an inward-concave waist part is arranged in the middle of the torsion spring, the torsion spring is inserted into the hole sleeve, and one end of the torsion spring is in contact with the annular table;

the reducing binding piece is tightly sleeved outside the waist-contracting part;

and the second clamping cover is of a hollow structure, the second clamping cover is arranged on the other end of the hole sleeve, and the second clamping cover abuts against the other end of the torsion spring.

8. A split pin as defined in claim 7, wherein the connector is one of a wire bond connector or a wire crimp connector.

9. A split pin as claimed in claim 8, wherein the reducing collar is one of a flat spring or a clockwork spring.

10. A split pin as defined in claim 9, wherein said reducing bundle is a profile.

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