CN201185255Y - Terminal structure of card connector - Google Patents

Abstract

The utility model relates to a card connector terminal structure, be equipped with the elasticity that is used for being connected with the electronic card electricity on a base plate and touch the arm, this elasticity touches the arm and forms from this base plate slant upward integrative extension, and the below that elasticity touched the arm has the rectangular slotted hole that this elasticity of preparation touched the arm and formed. The elastic contact arm comprises an elastic arm part formed by puncture and a contact part formed by blanking forming; the strip slot hole comprises a first area formed by blanking and a second area formed by puncturing. Moreover, the width of the contact part is smaller than that of the first area of the slot hole, and the width of the elastic arm part is the same as that of the second area of the slot hole, so that the elastic contact arm can be effectively prevented from being clamped in the second area of the slot hole when being extruded and deformed downwards, and the working performance of a product is improved. On the other hand, the metal plate is fully utilized, and the effective width of the elastic arm part is ensured, so that the elastic arm part has better deformation stress, and the service life is better.

Description

A card connector terminal structure

technical field

The utility model relates to the technology in the field of card connectors, in particular to a terminal structure applied in card connectors.

Background technique

As we all know, the main function of the card connector is to insert various electronic cards to form a telecommunication transmission between the electronic card and the circuit board, such as the signal of the memory card, multimedia card, secure digital card, etc. The card connector is sent to the reading and writing device to read relevant data. The main structure of the card connector is to use multiple contact terminals as the telecommunication transmission between the electronic card and the circuit board. Referring to Fig. 1, it shows the specific structure of a common single card connector terminal 10' on the market. Usually, the welding pin 110' of the tail end 10' of the terminal is connected to the circuit board, and the other end is connected to the electronic card through the elastic contact arm 120'. The flexible electrical connection that can be plugged repeatedly realizes the telecommunication connection between the electronic card and the circuit board.

Among them, at present, there are two main manufacturing methods for the elastic contact arm 120' on the contact terminal 10'. One method is to directly puncture the entire substrate 100' of the contact terminal 10'. The structure of the elastic contact arm 120' of the terminal 10' is shown in FIG. In the process of downward extrusion and deformation during work, it is often embedded in the slot 120 ′ and is stuck and unable to rebound and reset, causing inconvenience in use of the product. Another method is that the entire elastic contact arm 120' is directly formed by blanking. The structure of the elastic contact arm 120' of the contact terminal obtained by this manufacturing method is shown in Figure 3. There are three rings around the elastic contact arm 120'. The whole edge material in the direction is cut off, so that the width of the entire elastic contact arm 120' is smaller than the width of the slot hole 130" naturally formed on the substrate. The disadvantage of its existence is that due to the limited width of the contact terminal 10', it makes The width of the elastic contact arm 120' is too narrow, resulting in insufficient deformation stress of the elastic contact arm 120', which affects its service life.

Utility model content

The utility model aims at the defects existing in the prior art. The main purpose of the utility model is to provide a card connector terminal structure, which adopts the combination of blanking forming and piercing forming two manufacturing processes in turn, and the elastic contact arm of the terminal is in operation. In this state, there will be no jamming problem, and at the same time, the elastic stress of the elastic contact arm is improved, thereby prolonging the service life of the terminal, improving product quality, and obtaining more stable working performance.

In order to achieve the above object, the utility model adopts the following technical solutions:

A card connector terminal, comprising a base plate, one end of the base plate is provided with a soldering foot for welding on a circuit board, and the other end is provided with an elastic contact arm for electrical connection with an electronic card, and the elastic contact arm is obliquely upward from the base plate Extended integrally, the bottom of the elastic contact arm has a long slot formed by making the elastic contact arm; wherein, the elastic contact arm includes an elastic arm part formed by puncturing and a contact part formed by blanking molding. The part is located at the extended tail end of the elastic arm; the elongated slot includes a first area formed by blanking and a second area formed by puncturing, and the first area communicates with the second area; the width of the contact portion is smaller than the As for the width of the first area of the slot, the width of the elastic arm is equal to the width of the second area of the slot.

The width of the above-mentioned elastic arm portion is gradually narrowed from the root portion to the extended tail end.

The root of the elastic arm part is an arched structure.

The above-mentioned contact portion is an outwardly curved arc structure.

Compared with the existing technology, the utility model has the beneficial effect that it organically combines the blanking forming process and piercing forming process commonly used in the manufacture of terminals, rationally arranges its processing parts, and firstly blanks and forms the contact at the tail end of the elastic contact arm. part, and then pierced to form the elastic arm part. On the one hand, the width of the first area of the slot can be made larger than the width of the contact portion, so as to effectively prevent the elastic contact arm from being clamped in the first area of the slot when it is pressed and deformed downwards, thereby improving product quality and workability. performance. On the other hand, the width of the elastic arm portion can be made the same as the width of the second area of the slot hole, thereby making full use of the metal plate to ensure the effective width of the elastic arm portion, so that the elastic arm portion has a better Deformation stress for better service life.

Description of drawings

Fig. 1 is a partial enlarged view of a terminal of a card connector of the prior art;

FIG. 2 is a partially enlarged view of another prior art card connector terminal;

3 is a perspective view of an embodiment of a card connector terminal of the present invention;

Fig. 4 is a front partial enlarged view of an embodiment of the card connector terminal of the present invention;

5 is a perspective view of the first step of the method for manufacturing the card connector terminal of the present invention;

Fig. 6a is a three-dimensional view of the second step of the method for manufacturing the terminal of the card connector of the present invention;

Figure 6b is a partially enlarged view in Figure 6a;

7a is a three-dimensional view of the third step of the manufacturing method of the card connector terminal of the present invention;

Figure 7b is a partially enlarged view in Figure 7a;

Explanation of the accompanying drawings:

10', Card Connector Terminals 100', Substrate

110′, welding foot 120′, elastic contact arm

130'(130"), slotted hole

10. Card connector terminal 100. Substrate

110. Welding foot 120. Elastic contact arm

121. Contact part 122. Elastic arm part

122a, the root of the elastic arm 130, the slot

131. The first area 132. The second area

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

Referring to Fig. 3 and Fig. 4, the structure of the card connector terminal 10 of the present embodiment is shown, specifically including a substrate 100, the tail end of the substrate 100 is a welding pin 110 for welding with the circuit board, and the front end of the substrate is provided with a The elastic contact arm 120 electrically connected with the electronic card is integrally extended obliquely upward from the substrate 100 , and the elastic contact arm 120 has an elongated slot 130 formed on the bottom of the elastic contact arm 120 .

Wherein, the elastic contact arm 120 includes a punctured elastic arm portion 122 and a contact portion 121 formed by blanking, the contact portion 121 is located at the extended tail end of the elastic arm portion 122, and the elongated slot 130 includes The first area 131 formed by blanking and the second area 132 formed by piercing, the first area 131 and the second area 132 communicate. Moreover, the width of the contact portion 121 is smaller than the width of the first area 131 of the slot, and the width of the elastic arm portion 122 is equal to the width of the second area 132 of the slot.

The manufacturing method of the card connector terminal with the above-mentioned structure is described in detail below, which specifically includes the following steps:

In the first step, referring to FIG. 5 , firstly, the metal strip is blanked to form a plurality of substrates 100 and solder feet 110 at the ends of the substrates. This process is a conventional technique and its effects, and will not be repeated here.

The second step, referring to FIG. 6 a and FIG. 6 b , is blanking to form the bent contact portion 121 , and at the same time, the first area 131 of the slot 130 is formed on the substrate 100 . Specifically, both sides of the contact portion 121 need to be blanked first, and then the contact portion 121 is bent outward to form an arc-shaped structure. Since part of the material on both sides of the contact portion 121 is cut off, the width of the contact portion 121 is smaller than the width of the first region 131, whereby when the contact portion 121 extends into the first region 131, no The slot hole 130 clamps the contact portion 121 .

In the third step, referring to Fig. 7a and Fig. 7b, the elastic arm portion 122 is punctured and formed, and the second area 132 of the slot hole is formed on the substrate 100 at the same time, so that the width of the elastic arm portion 122 is equal to the second area 132 width. Wherein, the root portion 122a of the elastic arm portion 122 is arched outwards, and the width of the elastic arm portion 122 is gradually narrowed from the root portion 122a to the extended tail end, thereby effectively ensuring the direction of the elastic contact arm 120. When the elastic contact arm 120 is compressed and deformed by the external restoring elastic force, only the contact portion 121 extends downward into the first area 131 of the slot hole, and the elastic arm portion 122 only bends elastically in an arch bridge type. It does not extend into the second area 132 of the slot. In view of this, when the elastic contact arm 120 is working, even if the width of the elastic arm portion 122 is the same as the width of the second region 132 of the slot hole, the problem that the slot hole 130 is stuck to the elastic arm portion 131 will not occur. Moreover, compared with the above-mentioned second prior art production method of blank molding, the width of the elastic arm portion 122 obtained by the production method of the present invention is wider, thereby having better deformation stress.

The fourth step is to reshape the elastic contact arm 120 so that the height and shape of the contact portion 121 and the elastic arm portion 122 of the elastic contact arm 120 on each substrate 100 are consistent.

Finally, the formed contact terminal 10 is broken and separated from the metal strip to obtain the card connector terminal shown in FIG. 4 .

The key point of this utility model is to organically combine the blanking forming process and piercing forming process commonly used in the manufacture of terminals, and rationally arrange its processing parts. The elastic arm portion, on the one hand, can make the width of the first area of the slot hole larger than the width of the contact portion, so as to effectively prevent the elastic contact arm from being clamped in the first area of the slot hole when it is pressed and deformed downwards, lifting Product quality and work performance. On the other hand, the width of the elastic arm portion can be made the same as the width of the second area of the slot hole, thereby making full use of the metal plate to ensure the effective width of the elastic arm portion, so that the elastic arm portion has a better Deformation stress for better service life.

The above is only a preferred embodiment of the terminal structure of the card connector of the present invention, and does not limit the technical scope of the present invention in any way. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the scope of the technical solution of the present invention.

Claims (4)

1, a kind of card connector terminal structure, comprise a substrate, this substrate one end is provided with the welding foot that is used to be welded on the circuit board, the other end is provided with and is used for the elasticity contact arm that is electrically connected with electronic cards, it is characterized in that: this elasticity contact arm forms from the one extension obliquely of this substrate, and the below of elasticity contact arm has the rectangular slotted eye of making this elasticity contact arm and forming; Wherein

This elasticity contact arm includes the contact site that the elastic arm that punctures formation and blanking moulding form, and this contact site is in this elastic arm's extension tail end; This rectangular slotted eye comprises the first area that blanking forms and punctures the second area of formation that this first area and second area are communicated with;

The width of this contact site is less than the width of the first area of this slotted eye, and this elastic arm's width equals the width of the second area of this slotted eye.

2, a kind of card connector terminal structure according to claim 1 is characterized in that: above-mentioned elastic arm's width is the structure that narrows down gradually from its root to extending tail end.

3, a kind of card connector terminal structure according to claim 1, it is characterized in that: above-mentioned elastic arm's root is an arcuate configuration.

4, a kind of card connector terminal structure according to claim 1, it is characterized in that: above-mentioned contact site is bandy arcuate structure.

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