CN112822901B

CN112822901B - Circuit board fixing assembly

Info

Publication number: CN112822901B
Application number: CN201911126652.9A
Authority: CN
Inventors: 李金城
Original assignee: Inventec Pudong Technology Corp; Inventec Corp
Current assignee: Inventec Pudong Technology Corp; Inventec Corp
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2022-06-14
Anticipated expiration: 2039-11-18
Also published as: CN112822901A

Abstract

The invention discloses a circuit board fixing component which comprises a shell, a first supporting piece, a bearing piece and a circuit board. The shell is provided with a bearing surface. The first supporting piece is arranged on the bearing surface of the shell. The bearing part comprises a seat body part and a vertical part which are connected. The seat body part is arranged on the bearing surface of the shell, the vertical part comprises a first abutting surface, and an acute angle is formed between the first abutting surface and the bearing surface of the shell. The circuit board is movably arranged on the first supporting piece and movably abutted against the first abutting surface of the vertical part.

Description

Circuit board fixing assembly

Technical Field

The present invention relates to a circuit board fixing assembly, and more particularly, to a circuit board fixing assembly having a supporting member and a supporting member for supporting and supporting a circuit board, respectively.

Background

Today, the world is in an era of rapid development of information technology, and no matter whether enterprises or individuals use personal computers (such as desktop computers, notebook computers, etc.) to process business. With the development of communication technology, general personal computers have been unable to meet the business requirements of enterprises, so computer manufacturers have developed various types of servers for the enterprises to use in business.

Generally, a circuit board is disposed in a housing of the server. The circuit board is fixed between the two limiting planes of the fixing part, and the circuit board is provided with an electric connector for electrically connecting with other electronic elements in the server. However, the dimensions of the circuit board and the fixing member may have tolerance in manufacturing, so that the circuit board mounted on the fixing member may not be located at the correct position due to the thickness tolerance of the circuit board or the height tolerance of the two limiting planes of the fixing member. Therefore, research and development personnel in this field are currently working on solving the above-mentioned problems.

Disclosure of Invention

The present invention provides a circuit board fixing assembly, so as to solve the problem in the prior art that when an electrical connector on a circuit board is butted with other electronic components, the probability of damage to the electrical connector is easily increased due to the tolerance between the circuit board and an abutting member.

The invention discloses a circuit board fixing assembly, which comprises a shell, a first supporting piece, a bearing piece and a circuit board. The shell is provided with a bearing surface. The first supporting piece is arranged on the bearing surface of the shell. The bearing part comprises a seat part and a vertical part which are connected. The seat body part is arranged on the bearing surface of the shell, the vertical part comprises a first abutting surface, and an acute angle is formed between the first abutting surface and the bearing surface of the shell. The circuit board is movably arranged on the first supporting piece and movably abutted against the first abutting surface of the vertical part.

According to the circuit board fixing assembly disclosed in the above embodiment, since the circuit board is movably disposed on the first supporting member, and the circuit board movably abuts against the first abutting surface of the vertical portion, and the first abutting surface of the vertical portion of the abutting member and the bearing surface of the housing form an acute angle, even if the circuit board has a tolerance, the circuit board can be positioned at a proper position and maintained to abut against the first abutting surface of the vertical portion by adjusting the position of the circuit board, so that the electrical connector on the circuit board can be more accurately abutted against other electronic components, thereby reducing the probability of damage to the electrical connector.

The foregoing description of the present disclosure and the following description of the embodiments are provided to illustrate and explain the principles of the present disclosure and to provide further explanation of the scope of the invention as claimed.

Drawings

Fig. 1 is a perspective view of a circuit board fixing assembly according to a first embodiment of the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a partially enlarged view of the circuit board of fig. 2.

Fig. 4 is a top view of fig. 1.

Fig. 5 is a cross-sectional view of fig. 1.

Fig. 6 is an exploded view of a circuit board mounting assembly according to a second embodiment of the present invention.

Fig. 7 is a cross-sectional view of fig. 6.

Fig. 8 is a cross-sectional view of a circuit board mounting assembly according to a third embodiment of the present invention.

Wherein, the reference numbers:

1. 1a, 1b

10.

Housing

10a, 10b

11.

Bearing surface

11a, 11b

20. A first support member

A body part

Neck part

A head portion

30. 30a, 30b

31. Seat body part

A guide groove

32. 32a, 32b

321.. straight plate

322

3221. 322a, 322b

Groove 321a

323a, 323b

40. Circuit board

Plate part

A first outer side surface

A second outer side surface

413.. third lateral side

414. Groove flanks

416

417

418

4181

Narrow diameter section

An abutment portion

A second abutting surface

Guide groove

Perforation

431a

Annular wall surface

A second support member

51. An assembly cartridge

52. Stud bolt

521. A head portion

522. Body part 222a

Motherboard

Stud

80.

Width W1, W2, W3, W4, W5.

An obtuse angle theta 1

Acute angle theta 2, theta 3, theta 4

T1, T2

Detailed Description

Please refer to fig. 1 to 5. Fig. 1 is a perspective view of a circuit board fixing assembly according to a first embodiment of the present invention. Fig. 2 is an exploded view of fig. 1. Fig. 3 is a partially enlarged view of the circuit board of fig. 2. Fig. 4 is a top view of fig. 1. Fig. 5 is a cross-sectional view of fig. 1.

In the present embodiment, the circuit board fixing assembly 1 includes a housing 10, two first supporting members 20, a supporting member 30 and a circuit board 40. In addition, in this embodiment or other embodiments, the circuit board fixing assembly 1 further includes a second supporting member 50 and a main board 60.

The casing 10 is, for example, a casing of a server, and the casing 10 includes a carrying surface 11. The two first supporting members 20 are respectively fixed at different positions of the bearing surface 11 of the housing 10. The two first supporting members 20 are the same elements, so only one of the first supporting members 20 will be described in detail below. The first support 20 includes a body 21, a neck 22 and a head 23. The body 21 of the first support 20 is fixed on the carrying surface 11 of the casing 10, and the neck 22 is located between the body 21 and the head 23 and connects the body 21 and the head 23. The width W1 of the head 23 and the width W2 of the body 21 are greater than the width W3 of the neck 22.

In the present embodiment, the circuit board fixing component 1 may further include two studs 70 and two screws 80, for example. The two studs 70 are fixed to the bearing surface 11 of the housing 10 and are, for example, both internally threaded. The main board 60 abuts against one side of the two studs 70 away from the bearing surface 11 of the housing 10, and the two screws 80 pass through the main board 60 and are respectively locked to the two studs 70, so that the main board 60 is fixed to the housing 10 and keeps a distance from the bearing surface 11 of the housing 10. The second support 50 comprises an assembly cylinder 51. The assembly cylinder 51 is fixed to the mounting surface 11 of the housing 10. The body 21 of the first supporting member 20 is disposed through the main board 60, and the main board 60 abuts against one side of the assembly cylinder 51 of the second supporting member 50 away from the carrying surface 11 of the housing 10.

The support member 30 includes a seat portion 31 and a vertical portion 32. The vertical portion 32 includes a straight plate 321 and an inclined plate 322 connected to each other. The side of the straight plate 321 away from the inclined plate 322 connects the seat body 31, and the straight plate 321 is substantially perpendicular to the seat body 31. The inclined plate 322 and the straight plate 321 form an obtuse angle θ 1, and the obtuse angle θ 1 is, for example, 135 degrees or more and 165 degrees or less. In the present embodiment, the base portion 31 includes a guiding slot 311, and the second supporting member 50 further includes a stud 52, and the stud 52 includes a head 521 and a body 522 connected to each other. The head 521 of the stud 52 has an outer diameter larger than that of the body 522, and the body 522 has, for example, an external thread. The seat 31 is stacked on the main board 60 at a side of the assembly cylinder 51 away from the second support 50. The body 522 of the stud 52 passes through the guiding slot 311 of the seat body 31 and the main board 60 and is locked in the assembly cylinder 51 of the second support 50, and the head 521 of the stud 52 abuts against a side of the seat body 31 away from the main board 60. In the present embodiment, the seat portion 31 and the main board 60 are located between the head 521 of the stud 52 and the assembly cylinder 51, and the seat portion 31 is slidably disposed on the mounting surface 11 of the housing 10 through the body 522 of the stud 52 and the assembly cylinder 51. In addition, in the present embodiment, the inclined plate 322 of the vertical portion 32 of the supporting member 30 includes a first supporting surface 3221, and an acute angle θ 2 is formed between the first supporting surface 3221 and the supporting surface 11 of the housing 10. That is, the first abutting surface 3221 is a slope surface.

The circuit board 40 includes a plate portion 41 and an abutting portion 42. The plate portion 41 includes a first outer side surface 411, a second outer side surface 412, a third outer side surface 413, two groove side surfaces 414 and 415, and a groove bottom surface 416. The first, second and third outer side surfaces 411, 412 and 413 respectively face different directions, and opposite sides of the first outer side surface 411 are respectively connected to the second and third outer side surfaces 412 and 413. The slot side 414 is closer to the second outer side 412 than the slot side 415. One side of the slot bottom 416 is connected to the first outer side 411 by one of the slot sides 414, and the other side of the slot bottom 416 is connected to the first outer side 411 by the other slot side 415. The slot bottom 416 and the two

slot sides

414, 415 together form a recess 417.

The abutment 42 of the circuit board 40 is located in the recess 417 and is connected to the slot bottom surface 416 of the plate portion 41, and the two slot side surfaces 414, 415 of the plate portion 41 each maintain a distance from the abutment 42. That is, the abutting portion 42 is not connected to the two groove side surfaces 414, 415 of the plate portion 41. In addition, the abutting portion 42 of the circuit board 40 includes a second abutting surface 421.

In the present embodiment, the plate portion 41 of the circuit board 40 includes two snap grooves 418 separated from each other. Since the two locking grooves 418 have the same structure, only one of the locking grooves 418 will be described below. The locking groove 418 includes a wide section 4181 and a narrow section 4182 connected together, and the width W4 of the wide section 4181 is greater than the width W5 of the narrow section 4182. In addition, the width W4 of the wide diameter section 4181 of the snap groove 418 is greater than the width W1 of the head portion 23 of the first strut 20, and the width W5 of the narrow diameter section 4182 of the snap groove 418 is greater than the width W3 of the neck portion 22 of the first strut 20 and less than the width W1 of the head portion 23 and the width W2 of the body portion 21 of the first strut 20.

First, for convenience of explanation, an X axis, a Y axis, and a Z axis perpendicular to each other are defined. The X-axis is parallel to the normal direction of the groove side 414, and the Z-axis is perpendicular to the normal direction of the bearing surface 11 of the housing 10.

In the present embodiment, the neck portion 22 of the first support 20 is slidably located at the narrow diameter section 4182 of the fastening groove 418 of the plate portion 41 of the circuit board 40, so that the head portion 23 and the body portion 21 of the first support 20 limit the movement of the circuit board 40 in the positive and negative Z-axis directions, and the neck portion 22 of the first support 20 limits the movement of the circuit board 40 in the positive and negative Y-axis directions. In addition, the inclined plate 322 of the vertical portion 32 of the bearing member 30 is clamped in the groove 417 of the board portion 41 of the circuit board 40 and abuts against the two groove side surfaces 414 and 415 of the board portion 41, and the second abutting surface 421 of the abutting portion 42 of the circuit board 40 is matched with the first abutting surface 3221 of the inclined plate 322 of the vertical portion 32, so that the bearing member 30 limits the movement of the circuit board 40 in the positive and negative X axial directions.

Next, how the circuit board 40 is assembled to the first supporting member 20 and the supporting member 30 is described. First, the head portion 23 of the first support member 20 is inserted through the wide section 4181 of the locking groove 418 of the circuit board 40, so that the neck portion 22 of the first support member 20 is located at the wide section 4181 of the locking groove 418 of the circuit board 40. Next, the circuit board 40 is moved to locate the neck portion 22 of the first support member 20 at the narrow diameter portion 4182 of the locking groove 418 of the circuit board 40, and the groove 417 of the plate portion 41 of the circuit board 40 is aligned with the inclined plate 322 of the bearing member 30. Then, under the condition that the stud 52 of the second support 50 is slightly unscrewed, the guide slot 311 of the seat body portion 31 of the bearing member 30 is moved relative to the stud 52 of the second support 50, so that the inclined plate 322 of the bearing member 30 is located in the groove 417 of the board portion 41 of the circuit board 40, and the first abutting surface 3221 of the inclined plate 322 of the vertical portion 32 abuts against the second abutting surface 421 of the abutting portion 42 of the circuit board 40. Then, the studs 52 of the second support member 50 are screwed, so as to complete the assembly of the circuit board 40 to the first support member 20 and the support member 30.

In the present embodiment, the circuit board 40 shown in fig. 4 and 5 is, for example, a standard circuit board. Generally, circuit boards are manufactured with some tolerance. For example, the position of the groove of the board portion of the circuit board may have a tolerance, or the thickness of the circuit board may have a tolerance.

As shown in fig. 3 and 4, only in the case that the position of the groove of the board portion of the circuit board has a tolerance, if the distance between the groove side surface and the second outer side surface of the groove of the board portion of the circuit board having the tolerance is greater than the distance d1 between the groove side surface 414 and the second outer side surface 412 of the groove 417 shown in fig. 4, the circuit board needs to be adjusted to a proper position along the positive X axial direction from the position shown in fig. 4 to align the groove of the board portion with the inclined plate 322 of the bearing member 30, so that the inclined plate 322 of the bearing member 30 can enter the groove subsequently. Conversely, if the distance between the groove side surface and the second outer side surface of the groove of the plate portion of the circuit board with tolerance is smaller than the distance d1 between the groove side surface 414 and the second outer side surface 412 of the groove 417 shown in fig. 4, the circuit board needs to be adjusted to a proper position along the negative X axis direction from the position shown in fig. 4.

Therefore, since the circuit board is movably disposed on the first support 20, and the circuit board movably abuts against the first abutting surface 3221 of the supporting member 30, and the first abutting surface 3221 of the supporting member 30 is an inclined surface, even if the circuit board has a tolerance, the circuit board can be located at a proper position and kept abutting against the first abutting surface 3221 of the supporting member 30 by adjusting the position of the circuit board, so that the electrical connector on the circuit board can be accurately abutted against other electronic components, and the probability of damage to the electrical connector is reduced.

As shown in fig. 5, only when the thickness of the circuit board has a tolerance, if the thickness of the circuit board having the tolerance is smaller than the thickness T1 of the circuit board 40 shown in fig. 5, the seat body portion 31 of the support member 30 needs to be adjusted to a proper position along the negative Y axis from the position shown in fig. 5, so that the inclined plate 322 of the support member 30 can be located in the groove of the board portion of the circuit board, and the first abutting surface 3221 of the inclined plate 322 abuts against the second abutting surface of the abutting portion of the circuit board. Conversely, if the thickness of the circuit board with tolerance is greater than the thickness T1 of the circuit board shown in fig. 5, the seat portion 31 of the bearing member 30 needs to be adjusted to a proper position along the positive Y-axis direction from the position shown in fig. 5.

In this way, the seat portion 31 of the support member 30 can be slidably disposed relative to the supporting surface 11 of the housing 10, so that even if the thickness of the circuit board has a tolerance, the inclined plate 322 of the support member 30 can be ensured to be clamped into the groove of the circuit board to limit the movement of the circuit board, and the first abutting surface 3221 of the inclined plate 322 can abut against the second abutting surface of the abutting portion of the circuit board to provide an abutting effect.

Next, referring to fig. 6 and 7, fig. 6 is an exploded view of a circuit board fixing assembly according to a second embodiment of the disclosure. Fig. 7 is a cross-sectional view of fig. 6.

In the present embodiment, the circuit board fixing assembly 1a includes a housing 10a, a first supporting member 20a, a supporting member 30a and a circuit board 40a.

The housing 10a is, for example, a casing of a server, and the housing 10a includes a carrying surface 11 a. The first support 20a includes an assembly cylinder 21a, and the assembly cylinder 21a is fixed on the bearing surface 11a of the housing 10 a. The support member 30a includes a seat portion 31a and a vertical portion 32a connected to each other. The seat portion 31a is fixed to the bearing surface 11a of the housing 10 a. The vertical portion 32a includes a groove 321a, a first abutting surface 322a and a second abutting surface 323 a. The first abutting surface 322a and the second abutting surface 323a are located in the groove 321a and face two different directions respectively. In detail, the first abutting surface 322a faces away from the bearing surface 11a of the casing 10a, and the second abutting surface 323a faces toward the bearing surface 11a of the casing 10 a. The first abutting surface 322a and the bearing surface 11a of the housing 10a form an acute angle θ 3, the second abutting surface 323a and the bearing surface 11a of the housing 10a form another acute angle θ 4, and the two acute angles θ 3 and θ 4 are equal to each other. In other words, the first abutting surface 322a and the second abutting surface 323a are both inclined surfaces, and the absolute values of the slopes of the first abutting surface 322a and the second abutting surface 323a are equal.

The circuit board 40a includes a guiding slot 41a, and the first support 20a further includes a stud 22a. Stud 22a includes a head 221a and a body 222a connected together. The head 221a of the stud 22a has an outer diameter larger than that of the body 222a. The body 222a of the stud 22a is inserted into the guide groove 41a of the circuit board 40a and locked in the assembly cylinder 21a, and the circuit board 40a is interposed between the head 221a of the stud 22a and the assembly cylinder 21a.

In addition, the circuit board 40a further includes a through hole 42a and an annular wall 43a forming the through hole 42a. The through hole 42a includes, for example but not limited to, a wide groove and a narrow groove connected to each other. The annular wall 43a includes two lead-in ramps 431a. The two guiding inclined surfaces 431a face and back to the bearing surface 11a of the housing 10a, respectively. The vertical portion 32a of the support 30a passes through the through hole 42a, a portion of the circuit board 40a is located in the groove 321a of the vertical portion 32a, and the two inclined guide surfaces 431a respectively support against the first support surface 322a and the second support surface 323 a. In this way, the circuit board 40a is supported by the first supporting member 20a and abutted by the supporting member 30 a.

Next, how the circuit board 40a is assembled to the first supporting member 20a and the supporting member 30a is described. First, the guiding groove 41a of the circuit board 40a is aligned with the assembling cylinder 21a of the first supporting member 20a, and the vertical portion 32a of the supporting member 30a is passed through the through hole 42a of the circuit board 40a. Next, the body 222a of the stud 22a is inserted through the guide groove 41a of the circuit board 40a and locked into the assembly cylinder 21a of the first support 20a, but at this time, the stud 22a is not locked temporarily. Then, the circuit board 40a is moved to make the two inclined guiding surfaces 431a of the annular wall surface 43a of the circuit board 40a abut against the first abutting surface 322a and the second abutting surface 323a of the vertical portion 32a, respectively, and then the stud 22a is locked.

In the present embodiment, the circuit board 40a shown in fig. 7 is, for example, a standard circuit board. Generally, circuit boards are manufactured with some tolerance. For example, the thickness of the circuit board may have tolerances.

As shown in fig. 7, only when the thickness of the circuit board has a tolerance, if the thickness of the circuit board having the tolerance is smaller than the thickness T2 of the circuit board shown in fig. 7, the circuit board needs to be adjusted from the position shown in fig. 7 toward the bottom of the groove 321a of the vertical portion 32a of the supporting member 30a, so that the two guiding inclined surfaces of the annular wall surface thereof respectively abut against the first abutting surface 322a and the second abutting surface 323a of the vertical portion 32 a. Conversely, if the thickness of the circuit board with tolerance is greater than the thickness T2 of the circuit board shown in fig. 7, the circuit board needs to be adjusted from the position shown in fig. 7 toward the direction away from the bottom of the groove 321a of the upright portion 32 a.

In the embodiment, since the circuit board is movably disposed on the first support 20a, and the circuit board movably abuts against the first abutting surface 322a and the second abutting surface 323a of the abutting member 30a, and the first abutting surface 322a and the second abutting surface 323a of the abutting member 30a are both inclined surfaces, even if the thickness of the circuit board has a tolerance, the circuit board can be maintained to abut against the first abutting surface 322a and the second abutting surface 323a of the abutting member 30a by adjusting the position of the circuit board. Therefore, the influence of the thickness tolerance on the height of the electric connector on the upper surface and the lower surface of the circuit board can be reduced, so that the electric connector on the circuit board can be accurately butted with other electronic elements, and the probability of damage of the electric connector is reduced.

In the embodiment, the annular wall 43a of the circuit board 40a includes two guiding slopes 431a, which is not intended to limit the invention. In other embodiments, the annular wall of the circuit board may include only one guiding bevel, or may have no guiding bevel.

In the present embodiment, the first abutting surface 322a and the second abutting surface 323a of the vertical portion 32a are not limited to be inclined surfaces. For example, referring to fig. 8, fig. 8 is a cross-sectional view of a circuit board fixing assembly according to a third embodiment of the disclosure.

In the present embodiment, the circuit board fixing assembly 1b is similar to the circuit board fixing assembly 1a of fig. 6, so only the difference between the two will be described below. In this embodiment, only the first abutting surface 322b of the upright portion 32b of the abutting member 30b is an inclined surface, and the second abutting surface 323b of the upright portion 32b is parallel to the bearing surface 11b of the housing 10b. That is, the second abutting surface 323b is a plane.

In the embodiment, by the arrangement that the first abutting surface 322a is an inclined surface and the second abutting surface 323a is a plane, even if the thickness of the circuit board has a tolerance, the circuit board after the position adjustment is maintained to abut against the first abutting surface 322a and the second abutting surface 323a, so that the influence of the thickness tolerance on the height of the electrical connector on the upper surface of the circuit board is completely eliminated, and the probability of damage to the electrical connector is further reduced.

In the embodiment, the first abutting surface 322a is a slope, and the second abutting surface 323a is a plane, which is not intended to limit the invention. In other embodiments, the first abutting surface may be a flat surface and the second abutting surface may be a sloped surface. In this way, the effect of the thickness tolerance on the height of the electrical connector on the lower surface of the circuit board can be completely eliminated.

Claims

1. A circuit board mounting assembly, comprising:

a housing including a carrying surface;

a main board fixed on the bearing surface of the shell;

the first supporting piece penetrates through the mainboard and is arranged on the bearing surface of the shell;

the second support piece comprises an assembling cylinder and a stud, the assembling cylinder is fixed on the bearing surface of the shell, and the mainboard abuts against one side, far away from the bearing surface of the shell, of the assembling cylinder;

a bearing part, including a seat part and a vertical part connected with each other, the seat part including a guide slot, the seat part being stacked on one side of the motherboard far from the assembly barrel of the second support part, the stud of the second support part penetrating the guide slot of the seat part and the motherboard and being locked in the assembly barrel of the second support part, so that the seat part is slidably disposed on the bearing surface of the housing through the stud and the assembly barrel, the vertical part including a straight plate and an inclined plate connected with each other, one side of the straight plate far from the inclined plate being connected with the seat part, the straight plate being perpendicular to the seat part, the inclined plate and the straight plate sandwiching an obtuse angle, the inclined plate including a first abutting surface, the first abutting surface and the bearing surface of the housing sandwiching an acute angle; and

the circuit board is movably fixed with the first supporting piece and movably abutted against the first abutting surface of the vertical part;

the circuit board comprises a board part and a butting part, the board part comprises a groove, a groove bottom surface and two groove side surfaces, the groove bottom surface and the groove side surfaces form the groove, the groove side surfaces are respectively connected to two opposite sides of the groove bottom surface, the butting part is located in the groove and connected with the groove bottom surface, the groove side surfaces respectively keep a distance with the butting part, the butting part comprises a second butting surface, the inclined plate is clamped in the groove and abutted against the groove side surfaces, and the first butting surface is matched with the second butting surface.

2. The circuit board mounting assembly of claim 1 wherein the obtuse angle is 135 degrees or greater and 165 degrees or less.

3. The circuit board fixing assembly of claim 1, wherein the first supporting member comprises a body portion, a neck portion and a head portion, the body portion is fixed on the carrying surface of the housing, the neck portion is located between and connects the body portion and the head portion, the width of the head portion and the width of the body portion are greater than the width of the neck portion, the circuit board comprises a locking groove, the locking groove comprises a wide section and a narrow section which are connected, the width of the wide section is greater than the width of the narrow section and the width of the head portion, the width of the narrow section is greater than the width of the neck portion and less than the width of the body portion and the width of the head portion, and the neck portion is slidably located in the narrow section of the locking groove.

4. The circuit board fixing assembly of claim 1, wherein the stud of the second supporting member includes a head portion and a body portion connected to each other, the body portion of the stud penetrates through the guiding groove and is locked to the assembling barrel, the seat body is located between the head portion of the stud and the assembling barrel, and the seat body is slidably disposed on the carrying surface of the housing through the body portion of the stud and the assembling barrel.