JP5064040B2 - Electrical connector - Google Patents

Description

  The present invention relates to an electrical connector for receiving a wiring board having an electrical contact formed at an end, and more particularly to an electrical connector suitable for electrically connecting a wiring board such as a memory module to an information device.

  A conductive pattern (electrical contact) for contact is provided at the end of a printed circuit board or the like on which an electronic component is mounted, and electrical connection is established by directly inserting the end of the board including this conductive pattern into an electrical connector. To do is done. Such an electrical connector for a printed wiring board is called an edge socket connector. Hereinafter, the edge socket connector is simply referred to as a socket. This socket is used, for example, to connect a memory module on which a semiconductor memory element is mounted to a motherboard of a personal computer (hereinafter abbreviated as PC). This type of socket is usually configured as a zero insertion force (ZIF) type socket in order to facilitate insertion of a printed wiring board.

FIG. 14 is a perspective view showing the socket 300 proposed in Patent Document 1. As shown in FIG. The socket 300 is suitable for connecting the small substrate 10 such as a memory module to a PC motherboard. Further, the socket 300 has been proposed for the purpose of preventing misalignment between the contacts of the socket 300 and the electrical contacts of the small board 10 even when the arrangement of the electrical contacts of the small board 10 becomes a narrow pitch. Is.
As shown in FIG. 14, the socket 300 includes an insulating housing 310 having two slots 310 a each receiving one end provided with the electrical contact 12 of each small board 10, and a plurality of electric boards formed on each small board 10. A plurality of contacts 320 that elastically contact the contact 12 are provided. On both sides of the insulating housing 310, holding arms 340 having elasticity are arranged to face each other. An inward claw 340 a for holding the small substrate 10 is formed at the tip of the holding arm 340. The small substrate 10 has a recess 10b formed on its side surface. In the state where one end is received in the slot 310a, the small substrate 10 is fixedly held by the recess 10b engaging with the claw 340a of the holding arm 340.

In each slot 310a of the insulating housing 310, a positioning projection 310b (see FIG. 16) is formed at an asymmetrical position in the width direction. As described above, the positioning protrusion 310b is provided at an asymmetrical position, thereby preventing erroneous insertion of the small board 10 into the socket 300. The positioning protrusion 310b is formed integrally with the insulating housing 310. Further, an elastic member 330 is disposed at the tip of the positioning protrusion 310b.
FIG. 15 is a perspective view showing details of the elastic member 330. The elastic member 330 is formed at the one end of the small substrate 10 by being formed at the base portion 331 inserted into the positioning protrusion 310b, a pair of arms 332 that are elastically connected with a space extending symmetrically from the base portion 331, and at the tip of each arm 332. It is comprised by the notch 13 which opens, and the curved-shaped guide part 333 engaged.
Since the guide portion 333 is curved so as to wrap around the tip of the positioning protrusion 310b of the insulating housing 310, the guide portion 333 is smoothly inserted into the notch 13 of the small substrate 10 and is opened by the spring force of the arm 332 opened in a tapered shape. The small substrate 10 is elastically pressed against the inner wall of the notch 13 to guide the small substrate 10 to a predetermined position of the slot 310a. As a result, the receiving position of the small substrate 10 is regulated so that each of the electrical contacts 12 is connected to the corresponding contact 320.

  According to the socket 300, the separate elastic member 330 is disposed at the tip of the positioning protrusion 310 b formed integrally with the insulating housing 310, so that the guide portion 333 is elastically expanded and the notch 13 of the small board 10 is formed. The width of the guide portion 333 and the width of the notch 13 of the small substrate 10 can always be made to coincide with each other. For this reason, it is possible to prevent displacement of the receiving position of the small board 10 due to variations in the width of the notch 13 of the small board 10 and the dimension of the positioning projection 310b of the socket 300.

  However, as shown in FIG. 16, the pair of arms 332 of the elastic member 330 does not necessarily expand symmetrically with respect to the center of the positioning protrusion 310b. Therefore, when the pitch between the contacts 320 of the socket 300 is further reduced in response to a request for miniaturization and high density, the center of each electrical contact 12 of the inserted small board 10 and the corresponding contact 320 of the socket 300 are arranged. It becomes difficult to always match the center. Therefore, there is still a problem that it is difficult to regulate the receiving position of the small substrate 10 so that each electrical contact 12 is securely connected to the contact 320.

Patent Document 2 discloses a socket that can solve this problem.
FIG. 17 is a perspective view showing the socket 400 disclosed in Patent Document 2. As shown in FIG. The socket 400 includes an insulating housing 410 having a slot 410a for receiving one end of the small substrate 10 provided with the electrical contacts 12, and a plurality of contacts 420 that elastically contact the plurality of electrical contacts 12 formed on the small substrate 10. Is provided.
A positioning projection 411 is formed in the slot 410a of the insulating housing 410 at an asymmetric position in the width direction. The positioning protrusion 411 is formed integrally with the insulating housing 410. The positioning protrusion 411 is formed with an inclined portion 412 having a width that extends symmetrically downward. The inclined portions 412 are formed on both side surfaces of the positioning projection 411 as shown in FIG. Further, the inclined portion 412 is formed at the back of the positioning projection 411 in the direction in which the small substrate 10 is inserted.

FIG. 18 shows a state where the small board 10 is inserted into the socket 400.
As shown in FIG. 18A, one end of the small substrate 10 on which the electrical contact 12 is formed is inserted into the slot 410a of the socket 400 from obliquely above. Here, let W be the width of the notch 13 of the small substrate 10. Further, assuming that the width of the portion of the insulating housing 410 where the inclined portion 412 of the positioning projection 411 is not formed is W1 and the width of the lower end of the inclined portion 412 is W2, W, W1 and W2 have a relationship of W1 <W <W2. have. Then, when the small substrate 10 is inserted into the slot 410 a, the inner surface of the notch 13 of the small substrate 10 comes into contact with any part of the inclined surface of the inclined portion 412 as shown in FIG. Thereby, even if the width W of the notch 13 of the small board 10 is made considerably larger than the width W1 of the positioning projection 411, the small board 10 is placed at a predetermined position of the slot 410a of the socket 400 as long as it is less than the width W2. Can be positioned. Thereafter, the other end of the small substrate 10 is pushed down against the elasticity of the contact 420 until the small substrate 10 and a parent substrate (not shown) are parallel to each other. This state is shown in FIGS. 18 (A) and 18 (B). An inclined portion 412 that expands in a tapered shape toward the upper side is also disclosed in Patent Document 2.

However, in the socket 400 of Patent Document 2, the front end surface 412 a of the inclined portion 412 faces the small substrate 10. Further, the inclined portion 412 is formed at the back of the positioning projection 411. Therefore, when the small board 10 is inserted into the slot 410a, if the insertion angle or the insertion position in the width direction is inappropriate, the front end of the small board 10 is inclined when the small board 10 is inserted into the slot 410a. There is a possibility of colliding with the front end surface 412a of the portion 412. In this case, it is necessary to redefine the angle and position of the small substrate 10 after the small substrate 10 is retracted. That is, the socket 400 of Patent Document 2 cannot ensure smooth insertion into the slot 410a of the small board 10.

JP 2002-164118 A (FIGS. 1 to 3) Taiwan Utility Model Registration No. M267702 (Figs. 2-7)

  The present invention has been made based on such a technical problem, and positioning is performed so that an electrical contact of a small board and a corresponding contact are securely connected even if the pitch between the contacts becomes narrower. An object of the present invention is to provide an electrical connector that can insert a wiring board such as a small board into a slot smoothly.

The present invention relates to an insulating housing that receives the end portion of a wiring board having an end portion on which a plurality of electrical contacts are arranged, and a notch formed in the end portion of the wiring board, which is disposed in the insulating housing. and a positioning projection for regulating the acceptance position of the wiring board, which is held in an insulating housing, a plurality of contacts for electrical contact with resilient contact of the wiring board, comprising a, Ru is mounted on the mother board electrical It relates to connectors. The electrical connector of the present invention having the above as a basic component is characterized by the form of positioning protrusions.

The positioning protrusion of the present invention includes a portion (a) having a thickness Wa, a portion (b) having a thickness Wb, and a portion (c) having a thickness Wc. The part (b) connects the part (a) and the part (c). The portion (b) has a thickness Wb in the range of Wa to Wc. Furthermore, the thickness of the portion (b) continuously increases from the portion (a) to the portion (c), and the thickness continuously increases in the direction in which the wiring board is inserted.
Let W be the width of the notch in the wiring board. The thickness Wa of the positioning projection portion (a) satisfies the condition of the notch width W and Wa <W. Further, the thickness Wc of the portion (c) satisfies the relationship of the notch width W and W <Wc.
Further, the part (a), the part (b), and the part (c) are arranged in this order from the lower side close to the parent board to the upper side far from the parent board .
Further, the line indicating the boundary between the part (b) and the part (c) has a large inclination angle on the entrance side of the slot of the insulating housing into which the end of the wiring board is inserted, and the inclination angle toward the back of the slot Becomes smaller. The inclination angle here is an inclination angle with respect to the parent substrate.

In the present invention, the positioning protrusion is preferably configured by press-molding a metal sheet .
In this case, one side surface in the thickness direction of the positioning projection is a flat surface, and the other side surface facing the one surface is an inclined surface. Then, by adjusting the inclination of the inclined surface, the thickness is continuously increased from the portion (a) to the portion (c), and the thickness is continuously increased in the direction in which the small substrate is inserted. It is preferable.

  As described above, the electrical connector of the present invention includes a portion (a) having a thickness satisfying the condition of Wa <W and a portion (c) having a thickness satisfying the relationship of W <Wc. ). And this part (b) becomes thick continuously from the part (a) toward the part (c), and becomes thick continuously in the direction which inserts a wiring board. Therefore, even when the width W of the notch of the wiring board is larger than the thickness of the part (a), the wiring board is inserted and pushed into the notch toward the part (b), thereby The receiving position of the wiring board can be regulated so as not to cause the displacement of the contact. This is because the portion (b) has a thickness that matches the width W of the notch, and the wiring board can be inserted by being guided by the portion. This means that the receiving position of the wiring silver can be regulated in the process of pushing the wiring board to the receiving position. Further, the thickness of the portion (b) increases continuously in the direction in which the wiring board is inserted. That is, since the tip of the part (b) to be inserted into the notch is thin, it is easy to insert the part (b) into the notch. Therefore, once the insertion is performed, the wiring board can be smoothly inserted to the back.

  Constructing the positioning protrusions with a metal material is effective when the wiring board includes a high-hardness material such as glass fiber. That is, even if the wiring board is repeatedly inserted and removed, the positioning protrusions are hardly worn or damaged. As a result, even if the wiring board is repeatedly inserted and removed, the receiving position of the wiring board can be regulated so as not to cause a positional shift between the electrical contact and the contact.

  It is recommended that the positioning projections made of a metal material be produced by press molding from the viewpoint of cost. In the present invention, by making one side surface in the thickness direction of the positioning projection into a flat surface, the formability at the time of press molding can be improved. This is because the amount of compression due to pressurization can be reduced at the side portion that is a flat surface.

Hereinafter, the present invention will be described in detail based on the embodiments shown in FIGS.
FIG. 1 is a perspective view showing a state in which a small board 10 on which electronic components are mounted is inserted into a socket 100 according to the present embodiment. FIG. 2 is a plan view (FIG. 2A) and a front view (FIG. 2B) of the socket 100. FIG. 3 is a partially enlarged front view of the socket 100, and FIG. 4 is a partial sectional view taken along line 4a-4a in FIG.
The socket 100 is a ZIF type socket, and includes a substantially square columnar housing 110 made of an insulating material such as synthetic resin. The housing 110 includes a slot 110a into which one end of the small substrate 10 is inserted. The small substrate 10 has electrical contacts formed at a predetermined pitch on the front and back surfaces of one end inserted into the slot 110a. A slit-shaped notch 13 is formed at a position displaced from the center of one end of the small substrate 10 to one side. Further, the socket 100 includes a plurality of contacts 120 and 121 that elastically contact with the electrical contacts of the small board 10 respectively. Contact portions of the plurality of contacts 120 are arranged above the slot 110a. Contact portions of the plurality of contacts 121 are arranged below the slot 110a. The plurality of contacts 120 and 121 include tine portions 120a and 121a, respectively. The tine portions 120 a and 121 a are exposed from the lower surface of the housing 110. By soldering the tine portions 120a and 121a to the parent substrate 20, the socket 100 can be mounted on a PC, for example.

  In the slot 110a of the housing 110, a positioning projection 200 is disposed at a position corresponding to the notch 13 of the small substrate 10. The positioning protrusion 200 is made of a metal such as stainless steel. That is, the positioning protrusion 200 is manufactured as a separate member from the housing 110 and is disposed at a predetermined position of the slot 110a. The positioning protrusion 200 protrudes in the direction in which the small substrate 10 is inserted. The positioning protrusion 200 is fitted into a notch 13 formed at one end of the small substrate 10 inserted into the slot 110a, and guides the small substrate 10 to a predetermined receiving position. Since the positioning protrusion 200 is disposed at an asymmetrical position in the width direction of the housing 110, it is possible to prevent erroneous insertion of the small substrate 10. Further, the positioning protrusion 200 regulates the receiving position in the width direction of the small board 10 so that each electrical contact of the small board 10 is connected to the corresponding contacts 120 and 121 of the socket 100.

FIG. 5 is a perspective view showing the positioning protrusion 200, and FIG. 6 is a partial perspective view showing the housing 110 in which the positioning protrusion 200 is disposed. In FIG. 6, the contacts 120 and 121 are not shown.
The positioning protrusion 200 has a fitting portion 201 to be fitted in the notch 13 formed in the small substrate 10 and a mounting portion 205 to be attached to the housing 110. The positioning protrusion 200 can be produced by press-molding a metal sheet. However, the entire positioning projection 200 need not be made of a metal material, and at least the surface thereof may be made of a metal material.
The fitting part 201 includes a lower part 202, an intermediate part 203 and an upper part 204. The lower portion 202 has a uniform thickness. The thickness of the lower part 202 is assumed to be Wa. The upper portion 204 is also uniform in thickness. The thickness of the upper part 204 is set to Wc. The intermediate part 203 connects the lower part 202 and the upper part 204. Therefore, the thickness Wb is in the range of Wa to Wc. In addition, the intermediate portion 203 continuously increases in thickness from the lower portion 202 toward the upper portion 204, and also increases in thickness in the direction in which the small substrate 10 is inserted. The fitting portion 201 has portions with different thicknesses as described above, but the left side surface has no step when viewed from the front, and is entirely flat. On the other hand, the right side surface is inclined at a portion corresponding to the intermediate portion 203 and has a step. The small substrate 10 is inserted into the slot 110a while the inner surface of the notch 13 is guided by the flat surface and the inclined surface. In addition, the front here shall mean the side by which the small board | substrate 10 is arrange | positioned. The attachment portion 205 has a substantially flat shape and includes a notch 206 for joining to the housing 110. The notch 206 is open at the lower end of the attachment portion 205.

  Here, let W be the width of the notch 13 of the small substrate 10. The width W varies within a range of allowable dimensional tolerances. Similarly, the thickness Wa of the lower portion 202 of the fitting portion 201, the thickness Wb of the intermediate portion 203, and the thickness Wc of the upper portion 204 also vary within the allowable dimension crossing range. However, if the thickness Wa of the lower portion 202 and the thickness Wc of the upper portion 204 are made so as to satisfy the relationship of Wa <W <Wc, a portion having a thickness that matches the width of the notch 13 is formed in the intermediate portion 203. Can exist.

Next, a procedure from when the small board 10 is inserted into the slot 110a until the mounting of the small board 10 into the socket 100 is completed will be described with reference to FIGS.
FIG. 7 is a partial front view showing an initial state in which the small board 10 is inserted into the slot 110a, and FIG. 8 is a partial cross-sectional view taken along line 8b-8b of FIG. However, in FIG. 7, only the cross section of the small substrate 10 is shown.
The small substrate 10 is inserted into the slot 110a from obliquely above. At this time, the operator aligns the notch 13 formed at one end of the small substrate 10 with the positioning protrusion 200 provided in the housing 110 and then inserts the small substrate 10. The thickness Wc of the upper portion 204 of the fitting portion 201 of the positioning protrusion 200 is larger than the width W of the notch 13. Therefore, any position of the intermediate portion 203 is inserted into the notch 13. Here, in the positioning protrusion 200, the line L indicating the boundary between the intermediate portion 203 and the upper portion 204 has a large inclination angle on the inlet side of the slot 110a, and the inclination angle decreases toward the back of the slot 110a. Therefore, at the initial stage when the small substrate 10 is inserted into the slot 110a from obliquely above, the small substrate 10 is guided to the intermediate portion 203 having a large inclination angle on the entrance side. When the small board 10 is further pushed into the slot 110a, the small board 10 is guided to the intermediate portion 203 with a small inclination angle. As described above, the socket 100 can regulate the insertion angle of the small board 10 in the process of pushing into the back of the slot 110a from the start of insertion. Thereby, the operator can stably perform the operation of inserting the small substrate 10.

  In the initial stage of the insertion, a gap may be generated between the notch 13 and the intermediate portion 203. However, the inner surface of the notch 13 and both side surfaces of the intermediate portion 203 can be brought into contact with each other by further pressing the small substrate 10. This is because the intermediate portion 203 is thicker in the direction in which the small substrate 10 is inserted, and there is a portion having a thickness that matches the width W of the notch 13. Therefore, if the small board 10 is further pushed into the slot 110a, the inner face of the notch 13 and the side face of the intermediate section 203 are in contact with each other, and the small board 10 has a width (Wa to Wc) of the intermediate section 203. The range) and the width W of the notch 13 of the small substrate 10 are guided along the same position. Thereby, the small board | substrate 10 is positioned in the predetermined position about the width direction in the process in which insertion to the slot 110a is completed. This means that the small substrate 10 can be positioned at a predetermined position in the width direction without performing an extra operation other than the operation of inserting the small substrate 10. That is, the small substrate 10 is inserted to the back of the slot 110a while correcting the lateral displacement, and the contact between the electrical contacts of the small substrate 10 and the contacts 120 and 121 disposed in the housing 110 can be ensured. it can. Needless to say, the above positioning operation is similarly performed even when no gap is formed between the notch 13 and the intermediate portion 203 in the initial stage of insertion.

  When the small substrate 10 is inserted all the way into the slot 110a, the plurality of electrical contacts 12 formed on the upper and lower surfaces of the one end of the small substrate 10 contact the plurality of contacts 120 and 121, as shown in FIG. To do. The one end of the small substrate 10 is sandwiched between a large number of contacts 120 and 121 arranged vertically.

After inserting the small substrate 10 from diagonally upward to the back of the slot 110a, the other end of the small substrate 10 is pushed down. This pressing process is shown in FIGS. 10 is a partial front view showing one process of pushing down the small substrate 10, and FIG. 11 is a partial cross-sectional view taken along the line 10c-10c in FIG. However, in FIG. 10, only the cross section of the small substrate 10 is shown.
The small substrate 10 is pushed down in the direction of the arrow in FIG. 11 while resisting the elasticity of the contacts 120 and 121. Further, the small substrate 10 is pushed down until it becomes parallel to the parent substrate 20. Since one end of the small substrate 10 is sandwiched between a large number of elastic contacts 120 and 121, the small substrate 10 will not be displaced in the width direction during the push-down process.

  FIGS. 12 and 13 show a state where the pressing is completed and the small board 10 is received at a predetermined position of the slot 110a. In this state, the electrical contact 12 of the small substrate 10 and the contacts 120 and 121 are in elastic contact. Means for maintaining the small substrate 10 parallel to the parent substrate 20 is not limited. For example, the small substrate 10 may be fixed to the parent substrate 20 with fastening means such as bolts. As another means, a holding arm may be provided in the housing 110, and the other end of the small substrate 10 may be locked to the holding arm.

As described above, in the socket 100 according to the present embodiment, once the positioning projection 200 is inserted into the notch 13 of the small board 10, the small board 10 does not interfere anywhere. Therefore, the socket 100 does not have to perform an operation of retracting the small board 10 and pushing it in again, and the small board 10 can be smoothly inserted into the slot 110a. Moreover, the socket 100 according to the present embodiment can position the small substrate 10 in the angle and width directions in the process of inserting the small substrate 10 into the slot 110a.
Moreover, the socket 100 is comprised with the metal member which can consider the positioning protrusion 200 as a rigid body. Therefore, as compared with the structure using the elastic member disclosed in Patent Document 1, the small substrate 10 can be positioned with higher accuracy. This is because the socket 100 according to the present embodiment can ensure proper contact between the electrical contacts 12 of the small board 10 and the contacts 120 and 121 even when the contacts 120 and 121 are made narrower. Means.

One side surface of the positioning protrusion 200 is a flat surface. This is due to the following reason.
The positioning protrusion 200 is made of a metal material as described above. There are several methods for making the positioning protrusion 200 integrally from a metal material. Among them, press molding is preferable in consideration of cost. When press molding is performed, it is easier to process one of the two surfaces to which pressure is applied than by deforming the two surfaces by processing, rather than deforming both surfaces by processing. Therefore, in the present embodiment, one side surface of the positioning protrusion 200 is deformed by processing, but the other side surface remains flat.

  Further, keeping one side surface of the positioning projection 200 flat contributes to improving the processing accuracy of the positioning projection 200 itself and the assembly accuracy of the positioning projection 200 with respect to the housing 110. Usually, when producing a symmetrical member, the coordinates of each part are determined based on the center of symmetry. Therefore, when producing a member based on these coordinates, it is necessary to manage the dimensions from the center to each symmetrical part. This means that there are a total of two dimensions to be managed, one for each symmetrical part. On the other hand, when one side is a plane, the coordinates can be determined with the plane as a reference. This means that one managed dimension is sufficient for a given part. Therefore, the positioning protrusion 200 according to the present embodiment can obtain high dimensional accuracy. This dimensional accuracy is the same for the accuracy with which the positioning projection 200 is assembled to the housing 110. That is, when the groove for press-fitting the attachment portion 205 of the positioning protrusion 200 is formed in the housing 110, the dimension of the groove width can be set on the basis of the surface corresponding to the plane of the positioning protrusion 200.

  Although the socket 100 has been described above, the socket of the present invention should not be interpreted as being limited to the socket 100. The socket of the present invention allows the positioning protrusion to have a symmetrical shape. Even if the projection corresponding to the above-described intermediate portion is formed at a symmetrical position, the main effect of the present invention in that positioning is performed in the process of inserting the small board into the slot can be obtained.

It is a perspective view which shows the state by which the small board | substrate was inserted in the socket of this Embodiment. It is the top view (FIG. 2 (A)) and front view (FIG. 2 (B)) of the socket of this Embodiment. It is a front partial enlarged view of the socket of this Embodiment. It is a fragmentary sectional view which follows the 4a-4a line | wire of FIG. It is a perspective view of a positioning protrusion. It is a fragmentary perspective view which shows the state by which the positioning protrusion was arrange | positioned at the housing. It is a partial front view which shows the initial state which inserted the small board | substrate in the slot. It is a fragmentary sectional view which follows the 8b-8b line of FIG. It is a fragmentary sectional view which shows the state which inserted the small board | substrate to the back of the slot. It is a partial front view which shows the process in which a small board | substrate is pushed down after insertion to the socket of a small board | substrate is completed. It is a fragmentary sectional view which follows the 10c-10c line of FIG. It is a partial front view which shows the state in which the small board | substrate was received by the slot. It is a fragmentary sectional view which follows the 12d-12d line | wire of FIG. It is a perspective view which shows the conventional socket disclosed by patent document 1. FIG. It is a perspective view which shows the elastic member used for the conventional socket disclosed by patent document 1. FIG. It is a top view which shows typically a mode that the receiving position of a small board | substrate is controlled by the positioning protrusion with which the elastic member shown in FIG. 15 was mounted | worn. It is a perspective view which shows the conventional socket disclosed by patent document 2. FIG. It is sectional drawing (FIG. 18 (A)) and the partial front view (FIG. 18 (B)) which show the state which has inserted the small board | substrate in the conventional socket disclosed by patent document 2. FIG. FIG. 19 is a cross-sectional view (FIG. 19A) and a partial front view (FIG. 19B) showing a state where the mounting of the small board is completed on the conventional socket disclosed in Patent Document 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Socket 110 ... Housing, 110a ... Slot 120, 121 ... Contact, 120a, 121a ... Tine part 200 ... Positioning protrusion, 201 ... Insertion part, 202 ... Lower part, 203 ... Middle part, 204 ... Upper part 205 ... Mounting part 10 ... Small substrate, 12 ... electrical contact, 13 ... notch, 20 ... parent substrate

Claims (3)

An insulating housing that receives the end of the wiring board having an end on which a plurality of electrical contacts are disposed;
A positioning protrusion disposed in the insulating housing for fitting into a notch formed at the end of the wiring board to regulate the receiving position of the wiring board;
Said insulating housing is held in, and a plurality of contacts the electrical contacts and the elastic contact of the wiring board, the electrical connector that will be mounted on the mother board,
The positioning protrusion is
When the width of the notch is W,
A portion (a) where the thickness Wa satisfies Wa <W;
A portion (c) where the thickness Wc satisfies W <Wc;
The part (a) and the part (c) are connected, the thickness Wb is in the range of Wa to Wc, and the thickness is continuously increased from the part (a) to the part (c). And a portion (b) whose thickness is continuously increased in the direction of inserting the wiring board,
The part (a), the part (b) and the part (c) are arranged in this order from the lower side close to the parent substrate to the upper side far from the parent substrate ,
The line indicating the boundary between the part (b) and the part (c) has a large inclination angle with respect to the parent board on the inlet side of the slot of the insulating housing, into which the end of the wiring board is inserted, and the slot the inclined angle becomes smaller toward the back of,
An electrical connector characterized by that.   The electrical connector according to claim 1, wherein at least a surface of the positioning protrusion is made of a metal material. The positioning protrusion is produced by press molding a metal sheet,
One side surface in the thickness direction of the positioning protrusion is a plane,
By forming an inclined surface on the other side facing the one surface, the portion (b) has a thickness that continuously increases from the portion (a) to the portion (c), and The electrical connector according to claim 1, wherein the thickness continuously increases in a direction in which the wiring board is inserted.

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