CN114221149A

CN114221149A - Conductive connection mechanism

Info

Publication number: CN114221149A
Application number: CN202111386846.XA
Authority: CN
Inventors: 苏俊达; 陈海飞; 上官昌焜; 许圳杰; 曾舒钰; 吴泳斌; 陈威龙
Original assignee: Kehua Data Co Ltd; Zhangzhou Kehua Electric Technology Co Ltd
Current assignee: Kehua Data Co Ltd; Zhangzhou Kehua Electric Technology Co Ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-03-22

Abstract

The invention provides a conductive connecting mechanism which is conductively connected between a first substrate and a second substrate and comprises a conductive column, a conductive sleeve and a fixing piece, wherein the conductive column is arranged on the first substrate; one end of the conductive column is welded and fixed with the first substrate; the conductive sleeve is sleeved on the conductive column and can rotate relative to the conductive column by taking the axis of the conductive column as a rotating shaft, the conductive sleeve is in conductive contact with the conductive column, and the conductive sleeve and the first substrate are arranged at intervals; the fixing member is in threaded connection with the conductive post or conductive sleeve 120; the fixing piece is provided with a first limiting part, and the first limiting part and the conductive sleeve are matched to clamp the second base body. The invention effectively blocks the transmission of the torsional action force in the process of threaded connection, effectively avoids the problem that the first base body and the second base body are damaged due to the torsional action force, and ensures the structural integrity and the use reliability of the first base body and the second base body.

Description

Conductive connection mechanism

Technical Field

The invention belongs to the technical field of electronic equipment, and particularly relates to a conductive connecting mechanism.

Background

In PCB board lamination, the conductive connection between the boards is typically achieved through conductive copper posts. The fixation of the two circuit boards and the copper posts is generally achieved by means of a threaded connection during mounting. Because the threaded connecting piece generates circumferential torsion acting force when being screwed, if the operation is not proper, the PCB which is directly in threaded fit with the threaded connecting piece is easily damaged due to the overlarge circumferential torsion action, and the use performance of the PCB is influenced.

Disclosure of Invention

The embodiment of the invention provides a conductive connecting mechanism, aiming at avoiding the damage of a superposed conductive base body (such as a PCB) due to circumferential torsion on the premise of ensuring the conductive reliability.

In order to achieve the purpose, the invention adopts the technical scheme that: there is provided an electrically conductive connection mechanism electrically connected between a first substrate and a second substrate, comprising:

one end of the conductive column is welded and fixed with the first substrate;

the conductive sleeve is sleeved on the conductive column and can rotate relative to the conductive column by taking the axis of the conductive column as a rotating shaft, the conductive sleeve is in conductive contact with the conductive column, and the conductive sleeve and the first substrate are arranged at intervals;

the fixing piece is in threaded connection with the conductive column or the conductive sleeve;

the fixing piece is provided with a first limiting part, and the first limiting part and the conductive sleeve are matched to clamp the second base body.

In a possible implementation manner, the conductive post and the conductive sleeve are in clearance fit, an elastic conductive structure is arranged between the conductive sleeve and the conductive post, and the elastic conductive structure is elastically abutted against the conductive sleeve and the conductive post respectively.

In one possible implementation, the elastic conductive structure is a ring structure.

In one possible implementation, the conductive sleeve is slidably fitted with the conductive post in an axial direction of the conductive post;

the conductive connection mechanism further comprises an elastic piece, the elastic piece is arranged between the first base body and the conductive sleeve, and the elastic piece is configured with pretightening force for enabling the conductive sleeve to be far away from the first base body.

In a possible implementation manner, a second limiting portion is formed at one end, away from the first base, of the conductive column, a limiting step is formed in an inner cavity of the conductive sleeve, and the second limiting portion is matched with the limiting step to limit the maximum distance between the conductive sleeve and the first base.

In a possible implementation manner, the elastic member is enclosed in the conductive column.

In a possible implementation manner, the electrically conductive connection mechanism further includes a pressure sensing unit, and the pressure sensing unit is disposed between the elastic member and the first base body.

In a possible implementation manner, the pressure sensing unit is enclosed in the conductive column.

In a possible implementation manner, the conductive post is a cylinder, and the inner cavity of the conductive sleeve is a cylindrical cavity adapted to the conductive post.

In a possible implementation manner, a connecting hole is formed in the first base body;

and a connecting column matched with the connecting hole in an inserted manner is formed at one end of the conductive column, and the depth of the connecting hole is not less than the insertion length of the connecting column.

Compared with the prior art, the scheme shown in the embodiment of the application is that the second substrate is contacted with the conductive sleeve; because the conductive post is matched with the conductive sleeve in a rotating way, if the fixing part is in threaded connection with the conductive post, the conductive connection mechanism can be connected with the second base body firstly during assembly, and finally the end part of the conductive post is welded with the first base body, so that the torsional acting force of threaded connection can be prevented from being transmitted to the first base body; if the fixing piece is in threaded connection with the conductive sleeve, the conductive column can be welded with the first base body firstly, then the second base body is fixed, and when the fixing piece is screwed, the transmission of the torsional acting force to the conductive column is blocked by the rotating fit between the conductive column and the conductive sleeve, so that the torsional acting force can be prevented from being transmitted to the first base body; because the interval between conductive sleeve and the first base member sets up, even conductive sleeve takes place to rotate for leading electrical pillar relatively, its twisting action can not transmit first base member yet, avoids the structure of first base member of the direct contact of pivoted conductive sleeve to lead to impaired.

The conductive connection mechanism of the application can separate the connection of the first base body and the second base body from each other on the premise of ensuring the reliable conductivity, the installation of one base body and the conductive connection mechanism can not influence the installation of the other base body, the transmission of the torsion force in the threaded connection process is effectively blocked, the problem that the first base body and the second base body are damaged due to the torsion force is effectively avoided, and the integrity and the use reliability of the structure of the first base body and the second base body are ensured.

Drawings

Fig. 1 is an assembly diagram of a conductive connection mechanism, a first substrate and a second substrate according to an embodiment of the present invention;

fig. 2 is a schematic view of an assembly structure of a conductive connection mechanism according to an embodiment of the present invention;

fig. 3 is a schematic view of an assembly structure of a conductive connection mechanism according to a second embodiment of the present invention;

fig. 4 is an assembly structural diagram of the conductive sleeve, the conductive column, and the elastic conductive structure according to the third embodiment of the present invention.

Description of reference numerals:

100. a conductive connection mechanism; 110. a conductive post; 111. a second limiting part; 112. connecting columns; 120. a conductive sleeve; 121. a limiting step; 130. a fixing member; 131. a first limiting part; 140. an elastic conductive structure; 150. an elastic member; 160. a pressure sensing unit;

200. a first substrate; 210. connecting holes;

300. a second substrate.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third", etc. are used for distinguishing between different items and not for describing a particular sequence.

In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, directional terms such as "central", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", "high", "low", etc., are used for indicating the orientation or positional relationship based on that shown in the drawings and are used for convenience of description and simplicity of description only, and do not indicate or imply that the referenced device or element must have a particular orientation or be constructed and operated in a particular orientation and therefore should not be construed as limiting the scope of the present invention.

In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the terms "fixedly connected" or "fixedly connected" should be interpreted broadly, that is, any connection between the two that does not have a relative rotational or translational relationship, that is, non-detachably fixed, integrally connected, and fixedly connected by other devices or elements.

In the claims, the specification and the drawings of the present invention, the terms "including", "having" and their variants, if used, are intended to be inclusive and not limiting.

The embodiment of the invention provides a conductive connecting mechanism 100, aiming at avoiding damage to a first base 200 and a second base 300 which are overlapped due to circumferential torsion on the premise of ensuring the conductive reliability.

First, the first substrate 200 and the second substrate 300 to which the conductive connecting mechanism 100 of the present embodiment is applied will be described. In the present embodiment, the first substrate 200 is exemplarily shown as a PCB board, and the second substrate 300 is exemplarily shown as a copper bar, as shown in fig. 1 to 3. The conductive connection mechanism 100 of the present embodiment is not limited to the stacked connection of the PCB and the copper bar, as long as the first base 200 and the second base 300 have the similar outline shape to the copper bar or the PCB.

Referring to fig. 1 to fig. 3, the conductive connection mechanism of the present invention will now be described. The conductive connection mechanism 100 is conductively connected between the first substrate 100 and the second substrate 200, and includes a conductive post 110, a conductive sleeve 120, and a fixing member 130; one end of the conductive post 110 is welded and fixed with the first substrate 200; the conductive sleeve 120 is sleeved on the conductive pillar 110 and can rotate relative to the conductive pillar 110 by taking the axis of the conductive pillar 110 as a rotation axis, the conductive sleeve 120 is in conductive contact with the conductive pillar 110, and the conductive sleeve 120 and the first substrate 200 are arranged at intervals; the fixing member 130 is in threaded connection with the conductive post 110 or the conductive sleeve 120; the fixing member 130 is formed with a first position-limiting portion 131, and the first position-limiting portion 131 and the conductive sleeve 120 cooperate to clamp the second substrate 300.

Wherein the second substrate 300 needs to maintain effective contact with the conductive sleeve 120 to ensure the effectiveness of the electrical conduction.

Compared with the prior art, the conductive connecting mechanism provided by the embodiment is in contact with the conductive sleeve 120 through the second substrate 300; because the conductive post 110 is rotationally matched with the conductive sleeve 120, if the fixing member 130 is in threaded connection with the conductive post 110, the conductive connection mechanism can be connected with the second base 300 first during assembly, and finally the end of the conductive post 110 is welded with the first base 200, so that the torsional acting force of the threaded connection can be prevented from being transmitted to the first base 200; if the fixing member is in threaded connection with the conductive sleeve 120, the conductive post 110 may be welded to the first base 200, and then the second base 300 is fixed, when the fixing member 130 is screwed, the transmission of the torsional acting force to the conductive post 110 is blocked by the rotational fit between the conductive post 110 and the conductive sleeve 120, so that the torsional acting force is prevented from being transmitted to the first base 300; moreover, due to the spaced arrangement between the conductive sleeve 120 and the first substrate 200, even if the conductive sleeve 120 rotates relative to the conductive post 110, the twisting action is not transmitted to the first substrate 200, so that the structure of the first substrate 200 is prevented from being damaged due to the fact that the rotating conductive sleeve 120 directly contacts the first substrate 200.

The conductive connection mechanism has the following beneficial effects:

1) on the premise of ensuring reliable conductivity, the first substrate 200 and the second substrate 300 are connected and separated from each other, the installation of one substrate and the conductive connection mechanism does not affect the installation of the other substrate, the transmission of the torsion force in the process of threaded connection is effectively blocked, the problem that the first substrate 200 and the second substrate 300 are damaged due to the torsion force is effectively avoided, and the structural integrity and the use reliability of the first substrate 200 and the second substrate 300 are ensured.

2) The conductive sleeve 120 is arranged on the periphery of the conductive column 110, the area of the cross section of the conductive sleeve is large, the larger contact area between the conductive sleeve 120 and the second base body 300 is ensured, the first limiting portion 131 and the conductive sleeve 120 are matched to clamp the second base body 300, the second base body 300 is difficult to tilt, and the situation that the second base body 300 is not in contact with the conductive sleeve 120 can be effectively avoided.

3) The conductive sleeve 120 forms a protection in the circumferential direction of the conductive post 110, and in the area shielded by the conductive sleeve 120, the conductive post 110 is not directly impacted by radial impact.

4) Because the end of the conductive post 110 is located in the inner cavity of the conductive sleeve 120, the second substrate 300 and the conductive sleeve 120 also form protection in the axial direction of the conductive post 110, and the conductive post 111 is effectively prevented from being directly impacted and collided by the axial direction.

It should be understood that the arrangement path of the first substrate 200 and the second substrate 300 may be arranged along the up-down direction, or may be arranged along other directions, and is not limited herein. The embodiments of the present application exemplarily show the arrangement of the first substrate 200 below and the second substrate 300 above, and the description of the following embodiments is also based on this distribution, and the following description of the embodiments is based on this arrangement, and does not represent that the following embodiments can only be applied to this arrangement.

As to how the fixing element 130 is connected to the conductive post 110 or the conductive sleeve 120, for example, on the premise that the fixing element 130 is provided with an external thread structure, if the fixing element 130 is connected to the conductive post 110 by a thread, the upper end of the conductive sleeve 120 is open, and the thread section of the fixing element 130 passes through the opening of the conductive sleeve 120 and is connected to the screw hole formed at the upper end of the conductive post 110 by a thread, as shown in fig. 2; if the fixing member 130 is connected to the conductive sleeve 120 by screw threads, the upper end of the conductive sleeve 120 is provided with a screw hole adapted to the threaded section of the fixing member 130, and the fixing member 130 does not contact with the conductive post 110, as shown in fig. 3.

As an embodiment of the fixing element 130, a screw structure may be adopted, such that the fixing element has a threaded connection rod and a nut, the nut forms the first position-limiting portion 131, and the threaded connection rod is connected to the conductive pillar 110 or the conductive sleeve 120.

It should be noted that the fixing member 130 can be made of a conductive material or an insulating material, and does not have a practical influence on the conductive function between the first substrate 200 and the second substrate 300.

As a way of matching between the conductive sleeve 120 and the conductive post 110, not shown in the drawings, the conductive sleeve 120 and the conductive post 110 are rotationally matched and cannot move relatively in the axial direction of the conductive post 110. In order to ensure close contact of the second base 300 with the conductive sleeve 120, an elastic contact member capable of conducting electricity may be provided at an upper end of the conductive sleeve 120, the elastic contact member being press-contacted to the second base 300. The elastic contact member may be a conductive spring, a conductive rubber ring, or the like, and may satisfy the requirements of elasticity and conductivity.

In specific implementation, a ring groove may be formed on the conductive pillar 110, a positioning ring adapted to the ring groove is formed on the conductive sleeve 120, the conductive sleeve 120 rotates by matching the positioning ring and the ring groove, and the position of the conductive sleeve 120 is limited in the axial direction of the conductive pillar 110, so as to prevent the conductive sleeve 120 from directly contacting the first substrate 200.

As another matching method between the conductive sleeve 120 and the conductive post 110, referring to fig. 2 to 4, the conductive post 110 and the conductive sleeve 120 are in clearance fit, an elastic conductive structure 140 is disposed between the conductive sleeve 120 and the conductive post 110, and the elastic conductive structure 140 is elastically abutted to the conductive sleeve 120 and the conductive post 110, respectively. In this embodiment, the gap between the conductive post 110 and the conductive sleeve 120 prevents direct adhesion between the conductive post 110 and the conductive sleeve 120, the conductive sleeve 120 directly transmits the acting force to the conductive post 110 when the conductive post is subjected to radial impact, and the elastic conductive structure 140 is matched to absorb part of the radial impact force, so that the radial impact action on the conductive post 110 is effectively relieved, and the capability of resisting the radial impact is improved; in addition, the elastic conductive structure 140 can also always maintain the conductive contact between the conductive post 110 and the conductive sleeve 120, thereby avoiding the poor contact condition.

In specific implementation, the elastic conductive structure 140 is a ring structure, which is disposed around the conductive pillar 110 and provides a more comprehensive buffering effect in the circumferential direction of the conductive pillar 110.

More specifically, the elastic conductive structure 140 may be a continuous ring structure so as to provide an overall elastic protection in the circumferential direction of the conductive pillar 110; or may be a ring structure composed of a plurality of discontinuous elastomers, which is not limited herein. For example, if a continuous ring structure is adopted, the elastic conductive structure 140 may be a conductive spring ring, a conductive rubber ring, etc.; if a discontinuous ring structure is used, the elastic conductive structure 140 may comprise a plurality of conductive rubber strips or a plurality of conductive springs, etc.

In order to fix the elastic conductive structure 140 and prevent the elastic conductive structure from being dislocated and falling off during the axial movement between the conductive sleeve 120 and the conductive post 110, a positioning ring groove for accommodating the elastic conductive structure 140 is formed in the conductive sleeve 120 or the conductive post 110.

In some embodiments, referring to fig. 1 to 3, the conductive sleeve 120 is slidably engaged with the conductive post 110 in the axial direction of the conductive post 110; the conductive connection mechanism further includes an elastic member 150, the elastic member 150 is disposed between the first substrate 200 and the conductive sleeve 120, and the elastic member 150 is configured with a pre-tightening force for moving the conductive sleeve 120 away from the first substrate 200.

In this embodiment, the conductive sleeve 120 and the conductive post 110 can axially slide, so that the conductive sleeve 120 has a larger axial movement amount during assembly, and the axial elastic acting force of the elastic member 150 can ensure that the conductive sleeve 120 is close to the second substrate 300 after assembly, thereby avoiding the second substrate from tilting and ensuring the effectiveness of conductive contact; in addition, the conductive sleeve 120 is added with an axial elastic movement function, and can also adapt to overlapping connection at different heights, so that the use flexibility is improved; in addition, when the first substrate 200 or the second substrate 300 is subjected to an axial impact force, the elastic member 130 can also perform axial buffering, so as to prevent the first substrate 200 or the second substrate 300 from being damaged.

On the basis of the above embodiment, referring to fig. 3 to 4, in order to prevent the conductive sleeve 120 from coming off the conductive post 110, the second limiting portion 111 is formed at the upper end of the conductive post 110, a limiting step 121 is formed in the inner cavity of the conductive sleeve 120, and the second limiting portion 111 cooperates with the limiting step 121 to limit the maximum distance between the conductive sleeve 120 and the first substrate 200.

Referring to fig. 2 and fig. 3, the elastic element 150 surrounds the conductive post 110 to form a containment at the portion of the conductive post 110 exposed outside the conductive sleeve 120, and the containment mainly comes from the following aspects: 1) spatially, the elastic member 150 isolates the conductive post 110 from the external space to a certain extent, so as to prevent the radial impact from directly acting on the conductive post 110; 2) the elastic member 150 can also generate a certain elastic deformation in the radial direction, and then can play a role of radial buffering to a certain extent, so as to further improve the radial impact resistance. It should be noted that, besides the protection function, the elastic member 150 can also make the acting force applied to the conductive sleeve 120 more uniform.

In specific implementation, the elastic member 150 may be directly sleeved outside the conductive post 110 by a compression spring or an elastic sleeve, as shown in fig. 2 and 3; a plurality of elastic bodies (such as compressed springs, elastic blocks, etc.) may also be distributed along the circumferential direction of the conductive post 110.

It should be noted that the rotational fitting manner and the sliding fitting manner between the conductive sleeve 120 and the conductive post 110 may be separately arranged, or the conductive sleeve 120 and the conductive post 110 may be both rotatable and slidable in the same conductive connection mechanism, so that the inner circumferential surface with the smallest inner diameter in the conductive sleeve 120 and the outer circumferential surface of the main body of the conductive post 110 are arranged in a gap, and the rest of the structures may be combined with the structures of the two embodiments, see fig. 2 and fig. 3, which are not described herein again.

In some embodiments, referring to fig. 1 to 3, the conductive connection mechanism further includes a pressure sensing unit 160, and the pressure sensing unit 160 is disposed between the elastic member 150 and the first substrate 200. If the first substrate 200 and the second substrate 300, which are connected in an overlapping manner, are subjected to an excessive pressure value parallel to the predetermined path, the conductive connection structure may be damaged or even the first substrate 200 and the second substrate 300 may be damaged. In this embodiment, the pressure sensing unit 160 is disposed between the elastic member 150 and the first base 200, and can sense the pressure condition of the overlapped position in real time and feed back the pressure value to the control unit, the control unit determines the pressure condition according to the pressure value, and if the pressure surge is detected and exceeds a preset value, the control unit determines that the pressure is too large, and controls the system to be disconnected, and simultaneously generates an alarm.

In specific implementation, in order to ensure the accuracy of pressure monitoring, the pressure sensing unit 160 is fixed on the first substrate 200 by welding, bonding, or the like.

In addition, in order to simplify the arrangement of the signal transmission structure, a circuit structure electrically connected to the pressure sensing unit 150 may be further provided on the first base 200 without separately providing a transmission wire.

In some embodiments, referring to fig. 1-3, the pressure sensing unit 160 surrounds the conductive post 110. In this embodiment, the pressure sensing unit 160 forms an enclosure structure in the circumferential direction of the conductive pillar 110, so as to avoid the radial impact from directly acting on the conductive pillar 110, and improve the safety of the protection to the greatest extent on the premise of providing the pressure sensing unit 160.

In specific implementation, the pressure sensing unit 160 includes a pressure sensor, and a through hole is formed in the middle of the pressure sensor, and the pressure sensor can be directly sleeved on the periphery of the conductive post 110, as shown in fig. 1 to 3. Alternatively, the pressure sensing unit 160 includes a plurality of pressure sensors disposed around the conductive post 110 along the circumference of the conductive post 110, thereby forming a circumferential guard.

In some embodiments, referring to fig. 1 to 4, the conductive post 110 is a cylinder, and the inner cavity of the conductive sleeve 120 is a cylindrical cavity adapted to the conductive post 110. The cylindrical design of the conductive post 110 makes the current distribution on the conductive post 110 more uniform, and meanwhile, the conductive post is also convenient to be matched with the conductive sleeve 120 in a rotating way; correspondingly, the inner cavity of the conductive sleeve 120 and the conductive column 110 are coaxially arranged, so that the structures of the two are more compact.

On the basis of the above embodiment, the conductive sleeve 120 is cylindrical, and the conductive sleeve 120 and the conductive post 110 are coaxially disposed, so that the uniformity of the current on the conductive sleeve 120 is improved, and the design difficulty of the conductive sleeve 120 is reduced.

In some embodiments, referring to the figures, the first base 200 has a connection hole 210; one end of the conductive post 110 is formed with a connection post 112 inserted into the connection hole 210, and the depth of the connection hole 210 is not less than the insertion length of the connection post 112.

In the embodiment, the pre-positioning of the conductive column 110 and the first base 200 is realized in an insertion manner, and after the connection column 112 is inserted into the connection hole 210, further conductive fixing is realized in a welding manner, so that the positioning difficulty is reduced, and the installation efficiency is improved; in addition, since the connection post 112 does not protrude from the first base 200, the first base 200 itself can also circumferentially protect the conductive post 110, thereby further improving the safety of protection.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. An electrically conductive connection between a first substrate and a second substrate, comprising:

one end of the conductive column is welded and fixed with the first substrate;

2. The conductive connecting mechanism according to claim 1, wherein the conductive post and the conductive sleeve are in clearance fit, and an elastic conductive structure is disposed between the conductive sleeve and the conductive post, and the elastic conductive structure is elastically abutted against the conductive sleeve and the conductive post, respectively.

3. The conductive connection of claim 2, wherein the resilient conductive structure is a ring-like structure.

4. The electrically conductive connection of claim 1 or 2, wherein said electrically conductive sleeve is slidably engaged with said electrically conductive post in an axial direction of said electrically conductive post;

5. The conductive connection mechanism according to claim 4, wherein a second limiting portion is formed at an end of the conductive post away from the first substrate, a limiting step is formed in the inner cavity of the conductive sleeve, and the second limiting portion cooperates with the limiting step to limit a maximum distance between the conductive sleeve and the first substrate.

6. The conductive connection mechanism of claim 4, wherein the elastic member surrounds the conductive post.

7. The electrical connection mechanism of claim 4, further comprising a pressure sensing unit disposed between the resilient member and the first substrate.

8. The conductive connection mechanism of claim 7, wherein said pressure sensing unit is disposed around said conductive post.

9. The conductive connection mechanism of claim 1, wherein the conductive post is cylindrical and the inner cavity of the conductive sleeve is a cylindrical cavity that fits the conductive post.

10. The conductive connecting mechanism according to claim 1, wherein the first base body is provided with a connecting hole;