CN2840352Y - Card edge connector - Google Patents

Abstract

The utility model discloses a card edge connector, which comprises a body and a plurality of first and second terminals accommodated and fixed in the body, wherein the body is provided with a slot for inserting an electronic card and an installation surface which is close to a circuit board when the card edge connector is fixed on the circuit board, the first and second terminals all comprise a main body part, a fixing part extending from the main body part, a welding part and a contact part, the contact part is provided with a springing cantilever and contacts, the extending direction of the first terminal cantilever is opposite to the inserting direction of the electronic card, the extending direction of the second terminal cantilever is consistent with the inserting direction of the electronic card, and the cantilever can generate springing around a fulcrum when the tail end of the cantilever is stressed, the first and second terminal contacts are respectively exposed at two sides of the slot, the tail end of the second terminal cantilever is provided with a stress point when the electronic card exits, relative to the installation surface, the fulcrum of the second, the terminal can be prevented from rotating or even being damaged along with the withdrawal of the electronic card due to improper operation when the electronic card is withdrawn.

Description

card edge connector

【Technical field】

The utility model relates to an electric connector, in particular to a card edge connector for inserting an electronic card.

【Background technique】

Card edge connectors are widely used in electronic equipment to realize electrical connection between electronic cards and circuit boards on which the card edge connectors are installed. For example, US Pat. No. 5,393,234 discloses a card edge connector. The card edge connector includes a body having a socket and a plurality of conductive terminals accommodated in the insulating body. The insertion slot of the body is used to accommodate the butt end of the electronic card, and the contact portion of the conductive terminal is arranged in the elongated slot to electrically connect with the gold finger on the butt end of the electronic card. The conductive terminals include the upper conductive terminal protruding from the upper edge of the socket and the lower conductive terminal protruding from the lower edge of the socket. Joint extension. Because the electronic card is inserted into the slot of the card edge connector obliquely downward, the contact part of the lower conductive terminal protrudes from the slot and its extension direction is opposite to the insertion direction of the electronic card. If the insertion direction of the electronic card deviates or the insertion force is too If it is large, it will cause the lower conductive terminal to be damaged due to improper insertion force.

In order to solve the above problems, the lower conductive terminal of the card edge connector can be designed to extend in the same direction as the insertion direction of the electronic card, such as a card edge connector disclosed in Taiwan Patent Publication No. 316721, the contact part of the lower conductive terminal The extension direction is indeed consistent with the insertion direction of the electronic card, which effectively solves the problem that the terminal is damaged when the electronic card is inserted. However, when the electronic card is withdrawn in an inclined state, the friction force between the end of the lower conductive terminal and the electronic card is the largest. When the electronic card When the edge is pulled out from the insertion slot, the driving force of the electronic card to the end of the conductive terminal can easily cause the lower conductive terminal to rotate with the pulling direction of the electronic card, resulting in damage to the terminal. Even if the end of the conductive terminal is embedded in the body, it will be damaged due to the weak strength of the plastic body.

【Content of utility model】

The purpose of the utility model is to provide a card edge connector, the terminals of which have better elasticity and can prevent the electronic card from being damaged when the electronic card is inserted or pulled out.

In order to achieve the above object, the utility model adopts the following technical scheme: a card edge connector includes a body and a plurality of first and second terminals accommodated and held in the body, the body has a slot for inserting an electronic card and connects the card edge When the device is fixed on the circuit board, it is close to the mounting surface of the circuit board. Both the first and second terminals include a main body, a holding part extending from the main body, a soldering part and a contact part, and the contact part has a springable cantilever and a contact , the extension direction of the cantilever of the first terminal is opposite to the insertion direction of the electronic card, the extension direction of the cantilever of the second terminal is consistent with the insertion direction of the electronic card, and when the end of the cantilever is stressed, the cantilever can bounce around a point, the first and second terminal contacts They respectively protrude on both sides of the slot. When the electronic card is withdrawn, the end of the cantilever of the second terminal has a stress point. Relative to the installation surface, the fulcrum of the cantilever of the second terminal is higher than the force point of the second terminal when the electronic card is withdrawn.

Compared with the prior art, the card edge connector of the present invention has the following beneficial effects: by improving the terminal structure of the card edge connector, the height of the terminal stress point relative to the cantilever fulcrum of the terminal when the electronic card is withdrawn is reduced, preventing the electronic card from being , due to improper operation, the terminal will rotate or even be damaged with the withdrawal of the electronic card.

The utility model will be further described below in conjunction with specific embodiments with reference to the accompanying drawings.

【Description of drawings】

FIG. 1 is a perspective view of the card edge connector of the present invention.

FIG. 2 is an exploded view of the card edge connector of the present invention.

FIG. 3 is a cross-sectional view of the card edge connector of the present invention along the A-A direction shown in FIG. 1 .

FIG. 4 is a cross-sectional view of the card edge connector of the present invention along the B-B direction shown in FIG. 1 .

Fig. 5 is a force analysis diagram of the cantilever of the second terminal of the card edge connector when the electronic card is withdrawn.

【Detailed ways】

Please refer to FIG. 1 and FIG. 2 , the card edge connector 100 of the present invention includes a body 10 , a plurality of first terminals 20 , and a plurality of second terminals 30 . For the sake of clarity, only a few terminals are shown in FIG. 1 and FIG. 2 .

The body 10 includes an elongated base body 11 and locking arms 12 disposed at two ends of the base body 11 . A slot 111 is provided in the longitudinal direction of the extended side of the clasping arm of the base body 11 for inserting an electronic card. The base body 11 has a front end face 13 on one side of the slot 111 and an opposite rear end face 14, and the card edge is connected When the device is fixed on the circuit board, it is close to the lower bottom surface of the circuit board, that is, the mounting surface. As shown in Fig. 3 and Fig. 4, the upper and lower sides of the slot 111 are respectively provided with terminal accommodating passages 117, 118 for accommodating and holding the first and second terminals 20, 30, and the terminal accommodating passages 117, 118 penetrate through the base body 11 respectively. Rear end face 14, front end face 13. The upper edge of the slot 111 is formed with a first inclined surface 112 and a first horizontal surface 113 from the outside to the inside, while the lower edge is formed with a second horizontal surface 114 and a second inclined surface 115 from the outside to the inside. A vertical surface 116 is formed, wherein the first horizontal surface 113 is substantially parallel to the second horizontal surface 114 , and the first inclined surface 112 of the upper edge and the inclined surface 115 of the lower edge can form an inclined portion of the slot 111 .

As shown in FIG. 3 , the first terminal 20 is stamped and formed from a sheet metal body, and is assembled and held in the terminal receiving channel 117 of the base body 11 from the rear end surface 14 of the base body 11. 21 protrudes from the first holding portion 22 , the first welding portion 23 and the first contacting portion 24 . Wherein the first holding portion 22 has an interference protrusion 221 that interferes with the inner wall of the terminal receiving channel 117 to stably hold the first terminal 20 in the base body 11 . The first welding portion 23 protrudes backward from the rear end surface 14 of the base body 11, and can be welded on a circuit board (not shown), so as to realize the electrical connection between the first terminal 20 and the circuit board and connect the body 10 and the terminal 20 to the circuit. The boards are fixed together, and the bottom edge of the first main body part 21 is raised by a certain distance relative to the lower welding surface of the first welding part 23, which can prevent welding short circuit and solder climbing to a certain extent. The first contact portion 24 extends upwards and forwards from the first main body portion 21 to form a first cantilever 241 , the end of which is a first contact 242 protruding into the slot 111 , and the first contact 242 protrudes from the first horizontal surface 113 . And a good electrical connection with the electronic card inserted into the slot 111 is realized by the elasticity provided by the first cantilever 241 . After the first terminal 20 is assembled into the base body 11 , the excess part of the terminal strip is broken off to form a strip connection portion 211 , and the strip connection portion 211 protrudes from the rear end surface 14 of the base body 11 .

As shown in FIG. 4 , the second terminal 30 is stamped and formed from a sheet metal body, and is assembled and held in the terminal receiving channel 118 of the base body 11 from the front end surface 13 of the base body 11 . The extended second holding portion 32 , the second welding portion 33 and the second contacting portion 34 . Wherein the second holding portion 32 has an interference protrusion 321 that interferes with the inner wall of the terminal receiving channel 118 to hold the second terminal 30 stably in the base 11 , and at the same time, the second holding portion 32 is also provided with an upward stopper portion 322 , the stop portion 322 abuts against the inner wall of the terminal receiving channel 118 to realize the positioning of the second terminal 30 and prevent the rotation of the second terminal 30 during assembly. The second welding part 33 protrudes forward out of the substrate 11 and can be welded on a circuit board (not shown in the figure) to realize the electrical connection between the second terminal 30 and the circuit board and to fix the body 10 and the terminal 30 to the circuit board Together, and the bottom edge of the second main body portion 31 is raised by a certain distance relative to the lower soldering surface of the second soldering portion 33 , which can prevent soldering short circuit and solder climbing to a certain extent. The second contact part 34 extends from the middle of the second body part 31 forward and upward and then backward, including a connecting part 340 and a second cantilever 341 inclined to the front end surface 13. The angle between the cantilever and the connecting part is greater than 60 degrees and less than 90 degrees. degree, so that the contact portion 34 maintains a certain degree of elasticity and is not easy to break. The second cantilever 341 has a second contact 342 protruding into the slot 111, and is bent at the second contact 342 to divide the cantilever into a middle part and a contact end 343, and the ratio of the middle part to the contact end 343 is less than 3 . The side of the root of the inclined connecting portion 340 close to the second holding portion 32 is substantially flush with the upper edge of the second holding portion 32, thereby preventing the second terminal 30 from interfering with the stressed second contact portion 34 when assembled in the base body 11. was broken. The included angle α between the connecting part 340 and the second holding part is between 110° and 130°. Beyond the front end surface 13 of the substrate 11, the second contact 342 protrudes from the second horizontal surface 115, and realizes good electrical connection with the electronic card inserted into the slot 111 through the elasticity provided by the second cantilever 341, and contacts the tail end 343 The inclined direction is the same as that of the second inclined surface 114 , but the contact tail end 343 is higher than the second inclined surface 114 , that is, the contact tail end 343 is higher than the base body 10 of the corresponding socket 111 . In addition, the highest point A at the connection between the connecting portion 340 and the second cantilever 341 is higher than the extreme end point B of the contact tail 343 , and when the second cantilever 341 bounces, point A is the fulcrum of the second cantilever 341 . In addition, after the second terminal 30 is assembled into the base body 11 , the redundant part of the terminal strip is broken off to form a strip connection portion 311 protruding from the front end surface 13 of the base body 11 .

When the electronic card has the edge of the conductive sheet obliquely inserted into the slot 111, the first inclined surface 112 on the upper edge of the slot 111 and the inclined contact tail end 343 of the second terminal 30 play a certain guiding role, which can make the edge of the electronic card Insert the slot 111 smoothly, and because the extension direction of the contact portion of the second terminal 30 located at the bottom of the slot 111 is consistent with the insertion direction of the electronic card, the insertion force generated by the obliquely inserted electronic card will not damage the second terminal 30, At the same time, the stop portion 322 abutting against the inner wall of the terminal receiving channel 118 can prevent the second terminal 30 from rotating along the insertion direction to a certain extent. In addition, the inclined contact tail end 343 of the second terminal 30 is higher than the second inclined surface 114 at the lower edge of the slot 111 , which can avoid scratching and wearing of the base 11 at the lower edge of the slot 111 when the electronic card is inserted.

After the electronic card is inserted in place, it is rotated and pressed down to a horizontal position, and at the same time, the clasp arm 12 is stretched out and then reset, thereby holding the electronic card and realizing the electrical conduction between the card edge connector 100 welded on the circuit board and the electronic card. When the electronic card is withdrawn, the locking structure (not marked) of the buckle arm 12 is released, and the electronic card is bounced to an inclined state due to the elasticity of the first and second terminals 20, 30. When the electronic card is under the action of an external force When withdrawing downward and outward, the contact tail end 343 of the second terminal 30 bears the largest force, and point B becomes the main stress point, but because the fulcrum point A of the second cantilever 341 is higher than point B when the second cantilever 341 bounces, the second The terminal 30 can prevent the second cantilever 341 of the second terminal 30 from rotating or even being damaged along the electronic card withdrawing direction, ie clockwise, even under the action of improper external force.

Below in conjunction with FIG. 5 , the force situation of the second cantilever 341 of the second terminal 30 when the electronic card is withdrawn is analyzed. Because the direction of the electronic card withdrawn is basically certain, it is assumed that the electronic card is affected by the contact portion 34 of the second terminal 30. The active force at point B is F, and the direction of F is consistent with the direction in which the card is withdrawn, and the fulcrum A of the second cantilever 341 is fixed, then the component force F1 of F in the vertical direction of the line AB (F1=F×Sinb, The angle between the direction of F and the line AB is b) which is the force that can drive the second cantilever 341 to rotate with A as the fulcrum, and if the terminal cantilever is short, the force point B' of the terminal is flush with the fulcrum A , which can drive the cantilever to rotate with A as the fulcrum. The component force F1' (F1'=F×Sinb', wherein the angle between the direction of F and the line AB' is b', and b is smaller than b') will be greater than F1, that is, if the mounting surface of the card edge connector is used as a reference, the lower the point B of the force is relative to the point A of the fulcrum, the smaller the component force F1 that drives the second cantilever 341 to rotate, the second cantilever of the second terminal 30 The possibility of 341 rotation is also lower, so compared with the situation in which the force point of the second terminal of the card edge connector in the prior art is flush with or higher than the cantilever fulcrum, the utility model can suppress the second terminal to a certain extent In harsh operating environments, spin-on or even damage occurs along with the electronic card withdrawing direction.

Of course, the end of the second cantilever 341 of the second terminal 30 of the present invention can be embedded in the base body 11, and at the same time, when the electronic card is withdrawn, the force point B of the second terminal approaches the second contact 342. The installation surface is used as a reference, and the stress point is lower than the fulcrum A of the second cantilever 341 .

Claims (9)

1. bayonet connector, it comprises body and accommodates and is immobilizated in intrinsic some first, second terminal, when body has the slot of grafting electronic cards and bayonet connector is fixed in circuit board near the installed surface of circuit board, first, second terminal includes main part, the holding parts that autonomous body extends, weld part and contact site, and but contact site all has springing cantilever and contact, the first terminal cantilever bearing of trend is relative with the electronic cards direction of insertion, the second terminal cantilever bearing of trend is consistent with the electronic cards direction of insertion, and cantilever can produce springing around a fulcrum when cantilevered distal end was stressed, first, the protruding respectively slot both sides that are exposed to of second terminal contact, the second terminal cantilevered distal end had a stress point when electronic cards withdrawed from, it is characterized in that: with respect to installed surface, the stress point of second terminal was higher than the fulcrum of the second terminal cantilever when electronic cards withdrawed from.

2. bayonet connector as claimed in claim 1 is characterized in that: second terminal further comprises the connecting portion that autonomous body extends, and this connecting portion links to each other with the second terminal cantilever, and the junction forms the springing fulcrum of the second terminal cantilever.

3. bayonet connector as claimed in claim 2 is characterized in that: the connecting portion of second terminal is concordant substantially with the holding parts upper limb from its main part diagonally extending and its side near holding parts, and the angle of this connecting portion and holding parts is between 110 °～130 °.

4. bayonet connector as claimed in claim 1, it is characterized in that: the upper limb of body slot is formed with first inclined plane and first horizontal plane from outside to inside, lower edge then ecto-entad is formed with second horizontal plane and second inclined plane, wherein first horizontal plane and the second horizontal plane almost parallel, and the inclined plane of first inclined plane of upper limb and lower edge can constitute the sloping portion of slot.

5. bayonet connector as claimed in claim 4, it is characterized in that: the contact of first, second terminal is protruded first and second horizontal plane respectively, the incline direction of the contact tail end of the second termination contact portion is consistent with the incline direction on second inclined plane, and is higher than second inclined plane.

6. bayonet connector as claimed in claim 1, it is characterized in that: body has the front end face of slot one side and relative rear end face, body also is provided with the terminal accommodating passage of accommodating first, second terminal, and the terminal accommodating passage of accommodating the first terminal runs through the body rear end face, and the terminal accommodating passage of accommodating second terminal runs through the body front end face.

7. bayonet connector as claimed in claim 6, it is characterized in that: first, second terminal has the formed strip connecting portion of terminal material belt that fractures behind the body of being assembled in respectively, and the strip connecting portion of first, second terminal protrudes from the rear end face and the front end face of body respectively.

8. bayonet connector as claimed in claim 1, it is characterized in that: the holding parts of second terminal also is provided with stopper section upwards, and this stopper section abuts against on the terminal accommodating vias inner walls and the following solder side of the relative weld part of root edge of first and second terminal body is raised certain distance.

9. bayonet connector as claimed in claim 3 is characterized in that: the angle of described connecting portion and holding parts is 120 °.

Images