CN217847123U

CN217847123U - Double-side contact type card holder and card read-write device

Info

Publication number: CN217847123U
Application number: CN202221876676.3U
Authority: CN
Inventors: 张永峰; 罗雄亮
Original assignee: Shenzhen Mup Industrial Co ltd
Current assignee: Shenzhen Mup Industrial Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2022-11-18
Anticipated expiration: 2032-07-20
Also published as: KR20240000163U; KR200497946Y1

Abstract

The utility model provides a double-sided contact cassette and card read-write device. The double-sided contact type clamping seat comprises an insulating upper cover, an insulating seat body, an upper-layer terminal and a lower-layer terminal; the insulating upper cover and the insulating base body jointly define a card slot and an opening, one part of the upper-layer terminal is embedded into the insulating upper cover, and one part of the lower-layer terminal is embedded into the insulating base body; the upper layer terminal comprises an upper contact part exposed out of the insulating upper cover, and the lower layer terminal comprises a lower contact part exposed out of the insulating base body; go up contact site and lower contact site setting in the card slot, after the card inserted the card slot, go up contact site or lower contact site can support with the contact of card and hold and switch on. The utility model discloses a double-sided contact cassette and card readwrite device need not to distinguish the orientation of the positive and negative of card when user's card inserts the double-sided contact cassette, and this double-sided contact cassette equipment convenience is higher.

Description

Double-side contact type card holder and card read-write device

Technical Field

The utility model relates to a card read-write equipment technical field especially relates to a double-sided contact cassette and card read-write device.

Background

The IC card seats exist in the market, and even if a user inserts the card reversely, equipment comprising the card seats can still identify the information of the card and read and write the card. In the prior art, the number of parts of the card seat without distinguishing the front side and the back side of the card is large, and the assembly is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a double-sided contact cassette, the orientation that need not to distinguish the tow sides when the card inserts double-sided contact cassette, and this double-sided contact cassette equipment convenience is higher.

The utility model discloses still provide a card readwrite device including above-mentioned double-sided contact cassette.

According to the utility model discloses a double-sided contact cassette of first aspect embodiment, include: an insulating upper cover; the insulation upper cover is connected above the insulation base body, the insulation upper cover and the insulation base body jointly define a card slot, and the card slot is used for accommodating a card; the upper-layer terminal is partially embedded into the insulating upper cover and also comprises an upper contact part exposed out of the insulating upper cover; the lower-layer terminal is partially embedded into the insulating base body and further comprises a lower contact part exposed out of the insulating base body; the upper contact part protrudes into the card slot, and the lower contact part protrudes into the card slot, so that the upper contact part or the lower contact part can be abutted against the contact of the card.

According to the utility model discloses double-sided contact cassette of first aspect embodiment has following beneficial effect at least: the double-sided contact type card holder provided by the utility model is provided with an upper terminal and a lower terminal, when the side of the card with the contact points is upward, the upper terminal can be contacted with and conducted with the contact points of the card; when the side of the card with the contacts faces downwards, the lower-layer terminals are contacted and conducted with the contacts of the card. Therefore, when the card is inserted into the double-sided contact type card holder, the orientation of the front and back surfaces of the card does not need to be distinguished, and the terminal of the double-sided contact type card holder can be contacted with the contact even if the surface of the card with the contact is reversed.

In addition, the cassette among the prior art is provided with the slider, can promote the slider after the card inserts the cassette, and after the slider removed the certain distance, the terminal that originally was blocked by the slider just can stretch out and contact with the contact of card. And the utility model provides a double-sided contact formula cassette, upper terminal and lower floor's terminal can be direct and the card contact, need not additionally to set up in the double-sided contact formula cassette with upper terminal and lower floor's terminal complex slider, the spare part quantity of double-sided contact formula cassette is less, and this is favorable to improving equipment convenience and reduce cost. Moreover, because in the insulating upper cover of partly embedding of upper terminal, in the insulating pedestal of partly embedding of lower floor's terminal, the direct injection moulding of insulating upper cover in the outside of upper terminal, the direct injection moulding of insulating pedestal in the outside of lower floor's terminal the utility model discloses an in the manufacturing process of double-sided contact cassette, need not to assemble insulating upper cover and upper terminal again after the insulating upper cover shaping, also need not to assemble insulating pedestal and lower floor's terminal again after the insulating pedestal shaping again, this equipment convenience that also is favorable to improving double-sided contact cassette.

According to the utility model discloses a some embodiments, go up the contact site with the lower contact site is followed the width direction interval of insulating pedestal sets up the interval setting.

According to the utility model discloses a some embodiments, insulating upper cover includes first joint portion, insulating pedestal includes second joint portion, first joint portion with second joint portion supports each other and holds, in order to obstruct insulating upper cover with insulating pedestal separation.

According to some embodiments of the present invention, the insulating upper cover has a first avoidance hole, the insulating base body has a second avoidance hole, the first avoidance hole and the second avoidance hole are both communicated with the card slot, the first avoidance hole can accommodate a portion of the upper contact portion, the second avoidance hole can accommodate a portion of the lower contact portion; the upper-layer terminal has elasticity, and when the card is abutted against the upper contact part, the upper contact part has a tendency of moving towards the direction of entering the card slot; the lower-layer terminal has elasticity, and when the card is abutted against the lower contact part, the lower contact part has a tendency of moving towards the direction of entering the card slot.

According to some embodiments of the utility model, double-sided contact formula cassette still includes the lateral part and prevents static shell fragment, the grounding of lateral part antistatic shell fragment, the lateral part antistatic shell fragment install in the lateral part of double-sided contact formula cassette, at least some of lateral part antistatic shell fragment set up in the card slot, so that the lateral part antistatic shell fragment can with the lateral part edge contact of card.

According to some embodiments of the present invention, the side anti-static elastic sheet comprises a connecting portion and a side contact portion, the connecting portion is connected to the outer surface of the double-sided contact type card seat, one end of the side contact portion is connected to the connecting portion, and the other end of the side contact portion is disposed in the card slot; the side anti-static elastic sheet has elasticity, and when the side contact part is abutted against the card, the side contact part has a tendency of moving towards the direction of entering the card slot.

According to some embodiments of the invention, the connecting portion comprises a base portion connected with the side contact portion and a protruding portion connected to upper and lower ends of the base portion; the protruding part protrudes towards the direction close to the upper-layer terminal relative to the base part, the protruding part comprises a first positioning hole, the top of the insulating upper cover and the top of the insulating base body are respectively provided with a first positioning protrusion, and the first positioning protrusion penetrates through the first positioning hole.

According to some embodiments of the present invention, the double-sided contact type card holder further comprises a front-end anti-static elastic sheet, the front-end anti-static elastic sheet is grounded, and the front-end anti-static elastic sheet is connected to the front end of the insulating base body; and a part of the front-end anti-static elastic sheet protrudes into the card slot so that the front-end anti-static elastic sheet can be contacted with the front surface or the back surface of the card.

According to the utility model discloses a card read-write equipment of second aspect embodiment includes: a circuit board; in the dual-sided contact card socket according to the embodiment of the first aspect, the insulating base is mounted above the circuit board, and the upper terminal and the lower terminal are electrically connected to the circuit board.

According to some embodiments of the present invention, the double-sided contact type card seat further comprises a second positioning protrusion connected to the bottom of the insulating seat body; the circuit board is provided with a second positioning hole, and the second positioning bulge penetrates through the second positioning hole.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

fig. 1 is a schematic view of a double-sided contact card holder according to an embodiment of the present invention;

fig. 2 is a schematic view of the bottom of the dual-sided contact cartridge of fig. 1;

fig. 3 is a schematic view of a card reading/writing device according to an embodiment of the present invention;

FIG. 4 is an exploded view of the card reader of FIG. 3;

fig. 5 is a front view of the dual-sided contact cartridge of fig. 1;

fig. 6 is a schematic view of an upper terminal of a dual-contact card holder according to some embodiments of the present invention;

fig. 7 is a schematic view of a portion of an upper terminal at a first relief hole according to some embodiments of the present invention;

FIG. 8 is a schematic front view of the card;

FIG. 9 is a schematic view of a card contacting with an upper terminal, a lower terminal, and a side anti-static elastic sheet;

FIG. 10 is an enlarged view of region B of FIG. 9;

FIG. 11 is a schematic view of a card contacting a front anti-static dome;

FIG. 12 is an enlarged view of area A of FIG. 1;

fig. 13 is a schematic view of a clamping structure between the insulating upper cover and the insulating base.

Reference numerals: 100-double-sided contact type card holder, 102-upper terminal, 103-first avoidance hole, 104-upper contact part, 105-front-end antistatic elastic sheet, 106-opening, 107-side antistatic elastic sheet, 201-lower terminal, 202-second positioning protrusion, 203-second avoidance hole, 204-lower contact part, 300-card reading and writing device, 301-circuit board, 401-switch, 402-trigger, 403-insulating upper cover, 404-insulating base body, 405-first clamping part, 406-second clamping part, 501-first wall, 502-second wall, 503-card slot, 601-card, 1001-side contact part, 1201-base part, 1202-protrusion part, 1203-first positioning hole, 1204-first positioning protrusion part, 1205-connecting part.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the directional descriptions, such as the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The following explains "card 601 is inserted inversely". Referring to fig. 6, for some cards 601, one of the side surfaces of the card 601 (referring to one of the end surfaces of the card 601 along the thickness direction thereof) has a contact area 602, and the contact area 602 includes a plurality of contacts 603, and the contacts 603 are used for contacting with the terminals in the dual-sided contact card holder 100. For convenience of description, the side of the card 601 having the contacts 603 is referred to as the front side, and the side of the card 601 that is opposite to the front side in appearance is the back side (or the reverse side). In some prior art card holders, when the card 601 is inserted, it is necessary to ensure that the front face is oriented in a specific direction, for example, it is necessary to ensure that the front face is upward to be inserted into the card holder; if the card 601 is inserted reversely, the front face is arranged downward, and at this time, the card reading device cannot normally read or write the card 601. In other card holders in the prior art, when the card 601 is inserted into the card holder, the read-write operation on the card 601 is not affected no matter the front side is arranged upwards or downwards.

To the utility model provides a when double-sided contact formula cassette 100, the user inserted this double-sided contact formula cassette 100 with card 601, the user also need not to distinguish card 601's positive and negative intentionally, even if overturn the positive and negative then insert double-sided contact formula cassette with card 601, still do not influence card 601's reading and writing.

Referring to fig. 1 and 2, the dual-sided contact card socket 100 includes an insulating upper cover 403, an insulating housing 404, an upper terminal 102, and a lower terminal 201. The dual-sided contact type card socket 100 may be an IC card socket into which an IC card is inserted. Referring to fig. 5, an insulative top cover 403 is coupled over an insulative base 404, which together define a card slot 503. Referring to fig. 1 and 6, card slot 503 also has an opening 106 at one end for receiving a card 601. Opening 106 allows card 601 to enter or exit card slot 503. The upper terminal 102 and the lower terminal 201 are conductors, and for example, the upper terminal 102 and the lower terminal 201 are made of copper. The upper terminal 102 and the lower terminal 201 are used to contact the contact 603 of the card 601.

Referring to fig. 5, the wall surface of the card slot 503 includes a first wall 501 and a second wall 502 spaced apart from each other. A part of the upper terminal 102 is embedded in the insulating upper cover 403, and the upper terminal 102 further includes an upper contact portion 104 exposed from the insulating upper cover 403; a portion of the insulating base 404 of the lower terminal 201, and the lower terminal 201 further includes a lower contact portion 204 exposed from the insulating base 404. Referring to fig. 5, upper contact 104 protrudes relative to first wall 501 and into card slot 503; lower contact 204 projects relative to second wall 502 and into card slot 503.

The "embedding" and the "exposing" of the upper terminal 102 or the lower terminal 201 are explained here. The insulating upper cover 403 and the insulating base 404 may be formed by injection molding, and specifically, after a portion of the upper terminal 102 is placed in a mold, the insulating upper cover 403 is formed by injection molding on the outside of the upper terminal 102, and a portion of the lower terminal 201 is placed in another mold, and the insulating base 404 is formed by injection molding on the outside of the lower terminal 201. After the insulating upper cover 403 and the insulating base 404 are molded, the insulating upper cover 403 and the insulating base 404 are assembled together. Taking the upper terminal 102 as an example, a portion of the upper terminal 102 is wrapped by the material of the insulating upper cover 403, thereby "embedding" the insulating upper cover 403; while the upper contact 104 is not surrounded by the material of the insulating upper cover 403 and is thus "exposed" to the insulating upper cover 403. For example, referring to fig. 7, the upper contact 104 may be exposed from the insulating upper cap 403 and disposed in the first avoiding hole 103, and the upper terminal 102 may penetrate from a hole wall of the first avoiding hole 103 to an inside of the insulating upper cap 403, so that a portion of the upper terminal 102 is embedded in the insulating upper cap 403.

The following briefly describes the usage of the dual-sided contact card holder 100 of the present invention. When the dual-sided contact card socket 100 is inserted with the front side up, the upper terminal 102 contacts the contact 603, the upper terminal 102 is in conduction with the contact 603, and the lower terminal 201 contacts the back side and does not contact the contact 603. When the dual-sided contact card socket 100 is inserted with the front surface facing downward, the lower terminal 201 contacts the contact 603, the lower terminal 201 is electrically connected to the contact 603, and the upper terminal 102 contacts the rear surface and does not contact the contact 603. After the upper layer terminal 102 or the lower layer terminal 201 contacts and is conducted with the contact 603 of the card 601, an electric signal can be transmitted between the card 601 and a card reading device, so that reading and writing of the card 601 are realized. Therefore, the utility model provides a double-sided contact formula cassette 100, the user need not to distinguish the orientation of the tow sides of card 601 when card 601 inserts, reverses front and reverse side and then inserts double-sided contact formula cassette with card 601, still does not influence the reading and writing of card 601.

In some card holders in the prior art, the front and the back of the card 601 do not need to be distinguished when the card is inserted, but the card holder in the prior art is provided with a sliding block; the card 601 is inserted into the card seat and then pushes the sliding block, and after the sliding block moves for a certain distance, the terminal originally blocked by the sliding block extends out and contacts with the contact 603 of the card 601. And the utility model provides a double-sided contact formula cassette 100, upper terminal 102 and lower floor's terminal 201 can be directly with the contact of card 601, need not additionally to set up the slider in the double-sided contact formula cassette 100, the spare part quantity of double-sided contact formula cassette 100 is less, this is favorable to improving equipment convenience and reduce cost. Moreover, because insulating upper cover 403 is the outside of direct injection moulding in upper terminal 102, the outside of insulating pedestal 404 direct injection moulding in lower floor's terminal 201, the utility model discloses an in the assembling process of double-sided contact cassette 100, need not to assemble with upper terminal 102 again after insulating upper cover 403 shaping, also need not to assemble with lower floor's terminal 201 again after insulating pedestal 404 shaping, this equipment convenience that also is favorable to improving double-sided contact cassette 100.

The structure of the dual-contact card socket 100 will be described in detail below.

In some embodiments, the insulating upper cover 403 and the insulating base 404 may be connected in a clamping manner, so that screws and screwdrivers are not required to be screwed in the process of assembling the insulating upper cover 403 and the insulating base 404, which is beneficial to improving the convenience of assembling the insulating upper cover 403 and the insulating base 404. Specifically, referring to fig. 4, the insulating upper cover 403 includes a first clamping portion 405, the insulating base 404 includes a second clamping portion 406, and referring to fig. 13, the first clamping portion 405 and the second clamping portion 406 abut against each other, so as to prevent the insulating upper cover 403 and the insulating base 404 from being separated from each other.

In some embodiments, the upper terminal 102 and the lower terminal 201 may be staggered, so as to reduce the thickness of the dual-surface contact type card socket 100 and reduce the risk that the upper terminal 102 and the lower terminal 201 are in direct contact and short-circuited. Specifically, the upper terminal 102 and the lower terminal 201 are spaced apart in the width direction of the insulation housing 404 (which may correspond to the left-right direction in the drawing).

The upper layer terminal 102 and the lower layer terminal 201 have elasticity. During the insertion of the card 601, under the abutting action of the card 601, the upper contact portion 104 can move away from the card slot 503; since the upper terminal 102 has elasticity, the upper contact portion 104 tends to be reset, and the upper contact portion 104 can be tightly abutted against the card 601, so as to prevent the upper contact portion 104 from contacting with the contact 603 of the card 601 (i.e. the upper contact portion 104 contacts with the contact 603). Similarly, since the lower layer terminal 201 has elasticity, the lower contact portion 204 can be closely held against the card 601 so as not to cause the lower contact portion 204 to contact poorly with the contact 603 of the card 601 (refer to the case where the lower contact portion 204 contacts with the contact 603). In addition, the upper contact portion 104 and the lower contact portion 204 can also clamp the card 601 in the thickness direction of the card 601, which can reduce the risk of the card 601 accidentally sliding out of the card slot 503.

Referring to fig. 1 and 2, in some embodiments, the insulating upper cover 403 has a first avoiding hole 103, the insulating base 404 has a second avoiding hole 203, and both the first avoiding hole 103 and the second avoiding hole 203 are communicated with the card slot 503. The first escape hole 103 is used to make a space for the upper contact 104 to move, and the second escape hole 203 is used to make a space for the lower contact 204 to move. Specifically, when the upper contact portion 104 is held by the card slot 601 and moves in a direction away from the card slot 503, a portion of the upper contact portion 104 may enter the first avoiding hole 103; when the lower contact 204 is held by the clip 601 and moves away from the card slot 503, a portion of the lower contact 204 may enter the second avoiding hole 203. If the first and second avoiding

holes

103 and 203 are not provided, the thickness of the dual-side contact type card socket 100 needs to be increased in order to reserve a movement space of the upper and

lower contact portions

104 and 204.

During the process of reading and writing the card 601, the card 601 may become electrostatically charged. In some embodiments, in order to discharge the static electricity of the card 601, the dual-sided contact card holder 100 may include a side anti-static sheet 107. The side anti-static spring 107 is a conductor, referring to fig. 1, the side anti-static spring 107 is mounted on the side of the insulating upper cover 403 and the insulating base 404, and at least a portion of the side anti-static spring 107 is disposed in the card slot 503. As shown in fig. 10, the portion of the side anti-static spring 107 disposed in the card slot 503 can contact with the side edge of the card 601, and the static electricity on the card 601 can be transferred to the side anti-static spring 107 and then to the grounding point.

In order to make the side anti-static elastic sheet 107 and the side edge of the card 601 tightly abut against each other, the side anti-static elastic sheet 107 may have elasticity. Referring to fig. 12, the side anti-static spring 107 includes a connecting portion 1205 and a side contact portion 1001, the connecting portion 1205 is connected to the exterior of the dual-surface contact card socket 100, one end of the side contact portion 1001 is in contact with the connecting portion 1205, and the other end of the side contact portion 1001 extends into the card slot 503. Referring to fig. 10, during the insertion of the card 601, the side edge of the card 601 will abut against the side contact 1001, and the side contact 1001 will move away from the card slot 503. When the side contact portion 1001 is deviated from the initial position, the side contact portion 1001 tends to move in the direction of entering the card slot 503 and to be reset, and this movement tendency can keep the side contact portion 1001 and the card 601 in close contact, thereby preventing poor contact.

Referring to fig. 12, the connection portion 1205 includes a base portion 1201 and a projection portion 1202, in which the base portion 1201 serves as a portion of the connection portion 1205 for connection with the side contact portion 1001; the protruding parts 1202 are respectively connected to the upper and lower ends of the base part 1201, and the protruding parts 1202 protrude toward the upper terminal 102 with respect to the base part 1201. With reference to fig. 1 and 12, for the connecting portion 1205 in fig. 12, the protrusion 1202 protrudes in a direction close to the upper terminal 102, and may be such that the protrusion 1202 protrudes rightward with respect to the base 1201. Referring to fig. 12, the insulating upper cover 403 and the insulating base 404 each include a first positioning protrusion 1204, and the first positioning protrusion 1204 penetrates through the first positioning hole 1203. The hole wall of the first positioning hole 1203 can abut against the first positioning protrusion 1204, so as to prevent the lateral anti-static dome 107 from moving laterally. The two protrusions 1202 can also clamp the insulating upper cover 403 and the insulating base 404, thereby improving the connection between the insulating upper cover 403 and the insulating base 404.

Referring to fig. 1, in some embodiments, in order to discharge static electricity from a card 601, the dual-side contact card holder 100 may include a front-end static electricity prevention dome 105. The front anti-static elastic piece 105 is connected to the front end (i.e. the end close to the opening 106) of the insulating base 404, and a portion of the front anti-static elastic piece 105 protrudes into the card slot 503. The front anti-static dome 105 is grounded and the front anti-static dome 105 can contact the card 601, and specifically, referring to fig. 11, the front anti-static dome 105 is used to contact the front or back of the card 601. The static electricity of the card 601 can be transferred to the grounding point through the front-end anti-static elastic sheet 105.

The utility model also provides a card read-write device 300, card read-write device 300 includes circuit board 301 and the double-sided contact cassette 100 in above-mentioned arbitrary embodiment. As shown in fig. 3, the insulating base 404 is mounted above the circuit board 301. As shown in fig. 9, the upper terminal 102 and the lower terminal 201 are electrically connected to the circuit board 301. The insulating base 404 and the circuit board 301 may be connected by clamping, screwing, adhering, etc.

In order to facilitate the assembly between the insulation base 404 and the circuit board 301, the insulation base 404 further includes a second positioning protrusion 202, and the circuit board 301 further has a second positioning hole 407. Referring to fig. 2, the second positioning protrusion 202 is connected to the bottom of the insulating base 404 and protrudes relative to the insulating base 404; referring to fig. 4, the circuit board 301 has a second positioning hole 407, and the second positioning protrusion 202 is inserted into the second positioning hole 407.

When the dual-sided contact card socket 100 includes the side anti-static spring 107, the side anti-static spring 107 is electrically connected to a ground point of the circuit board 301. When the dual-sided contact card socket 100 includes the front-end anti-static elastic sheet 105, the front-end anti-static elastic sheet 105 is electrically connected to the ground point of the circuit board 301.

Referring to fig. 4, the dual-contact card socket 100 may further include a switch 401, and the switch 401 is communicatively connected to the circuit board 301. When the card 601 is inserted into the card slot 503, the card 601 triggers the switch 401, and after the switch 401 is triggered, the card reading/writing device 300 reads and writes the card 601 again.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. Double-sided contact cassette, its characterized in that includes:

an insulating upper cover;

the insulation upper cover is connected above the insulation base body, the insulation upper cover and the insulation base body jointly define a card slot, and the card slot is used for accommodating a card;

the upper-layer terminal is partially embedded into the insulating upper cover and also comprises an upper contact part exposed out of the insulating upper cover;

the lower-layer terminal is partially embedded into the insulating base body and further comprises a lower contact part exposed out of the insulating base body;

the upper contact part protrudes into the card slot, and the lower contact part protrudes into the card slot, so that the upper contact part or the lower contact part can be abutted against the contact of the card.

2. The dual-sided contact cartridge of claim 1, wherein the upper contact portion and the lower contact portion are spaced apart along a width direction of the insulative housing.

3. The dual-sided contact card holder as claimed in claim 1, wherein the insulating upper cover includes a first clamping portion, the insulating base includes a second clamping portion, and the first clamping portion and the second clamping portion are supported against each other to prevent the insulating upper cover and the insulating base from separating.

4. The dual-sided contact card holder according to claim 1, wherein the insulating upper cover has a first avoiding hole, the insulating base has a second avoiding hole, the first avoiding hole and the second avoiding hole are both in communication with the card slot, the first avoiding hole is capable of accommodating a portion of the upper contact portion, and the second avoiding hole is capable of accommodating a portion of the lower contact portion;

the upper-layer terminal has elasticity, and when the card is abutted against the upper contact part, the upper contact part has a tendency of moving towards the direction of entering the card slot; the lower-layer terminal has elasticity, and when the card is abutted against the lower contact part, the lower contact part has a tendency of moving towards the direction of entering the card slot.

5. The dual-sided contact cartridge of claim 1, further comprising a side anti-static spring, the side anti-static spring grounded, the side anti-static spring mounted to a side of the dual-sided contact cartridge, at least a portion of the side anti-static spring disposed in the card slot to enable the side anti-static spring to contact a side edge of the card.

6. The dual-sided contact card holder according to claim 5, wherein the side anti-static spring plate comprises a connecting portion and a side contact portion, the connecting portion is connected to an outer surface of the dual-sided contact card holder, one end of the side contact portion is connected to the connecting portion, and the other end of the side contact portion is disposed in the card insertion slot;

the side anti-static elastic sheet has elasticity, and when the side contact part is abutted against the card, the side contact part has a tendency of moving towards the direction of entering the card slot.

7. The dual sided contact cartridge according to claim 6, wherein the connection part includes a base part connected with the side contact part and a protrusion part connected to upper and lower ends of the base part;

the protruding part protrudes towards the direction close to the upper-layer terminal relative to the base part, the protruding part comprises a first positioning hole, the top of the insulating upper cover and the top of the insulating base body are respectively provided with a first positioning protrusion, and the first positioning protrusion penetrates through the first positioning hole.

8. The dual-sided contact cartridge of claim 1, further comprising a front-end anti-static spring, the front-end anti-static spring being grounded and connected to the front end of the insulating housing;

and a part of the front-end anti-static elastic sheet protrudes into the card slot so that the front-end anti-static elastic sheet can be contacted with the front surface or the back surface of the card.

9. Card read write device, its characterized in that includes:

a circuit board;

the dual-surface contact card holder of any one of claims 1 to 8, wherein the insulating holder is mounted above the circuit board, and the upper layer terminal and the lower layer terminal are electrically connected to the circuit board.

10. The card reading/writing device of claim 9, wherein the dual-surface contact card holder further comprises a second positioning protrusion, the second positioning protrusion is connected to the bottom of the insulating base; the circuit board is provided with a second positioning hole, and the second positioning bulge penetrates through the second positioning hole.