CN2726149Y - Electronic card connector - Google Patents

Abstract

The utility model provides an electronic card connector, which comprises a plurality of terminals, a group of position detecting terminal assemblies, an insulation body, a sliding block, a pull rod, a spring, an elastic preforming, a servo holding card elastic plate, an earth elastic plate and a metallic shield cover. The electronic card connector adopts a repeated slide way with asymmetrical shape to control the close and release of the electronic card, the elastic preforming is used to provide a stable and reliable down pressure in the engagement process between the sliding head of the pull rod and the sliding block, and reduce the resistance force of friction between the pull rod and the preforming, the correct engagement of the pull rod is ensured, the service life of the connector is prolonged, and the conditions of swinging card while in use and flying card while in retreating card can be prevented effectively.

Description

Electronic card coupler

[technical field]

The utility model relates to a kind of electronic card coupler.

[background technology]

Present all kinds of electronic products (mainly comprising various mobile class digital media products) are the function for realizing that it is default in use, often need the data that produce in the equipment work are immediately preserved or transmitted, for portable product, in time preserve data and just seem particularly important, thereby nearly all digital product all uses movable storage device to come stored information without any exception, and for the ease of the storage and the exchange of information, such digital product disposes all kinds of memory card connectors usually, realizes carrying out exchanges data with memory card by connector.

For different memory cards, its storage mode, storage medium, shape, size, and power consumption be not quite similar, and digital product also can be selected the memory card of optimum size, capacity and power consumption as required in design; All kinds of memory card connectors that existed at present just usually can not satisfy the specific (special) requirements of some product.

Present in addition electronic card coupler adopts mostly and pushes away the grafting that (push-push) formula structure is blocked, this structure all has exposure at U.S. Pat 20020114447, US20020192991, the advantage of this structure is that electronic cards is pegged graft conveniently, if but the design of push-push ejection mechanism is improper, then can cause difficulty of this part assembling, also can cause life-span and reliability decrease.Shown in U.S. Pat 200211447, its ejection mechanism comprises: an insulating body, and this insulating body one side is provided with slide rail along the plug-in card direction, be provided with a hole clipping in slide rail homonymy insulating body bottom, and this slide rail plug-in card one end is provided with the Spring Card post; One slide block, this slide block lateral surface is provided with the cam chute, this slide block is provided with the chute that matches with slide rail on the insulating body along the card direction of motion, this chute can be along being located at the slide rail engagement on the insulating body and being free to slide after the combination, this slide block one end is provided with Spring Card post, a pull bar, a spring, a crown cap, one and the integrally formed pull bar compressing tablet of crown cap, slide block is installed on insulating body, the pull bar two ends snap in respectively in the cam chute of the hole clipping of insulating body and slide block, and a both ends of the spring then fastens with two card posts respectively.Again crown cap is fastened on the insulating body, its pull bar compressing tablet is pressed on the pull bar; Take this spring force, the combination that pull bar, cam chute and pull bar compressing tablet form is with the plug-in card of realizing connector and move back the card function.The advantage of this card connector is that electronic cards is pegged graft conveniently, but because cam planes is arranged on the side, cause the card connector overall dimension bigger than normal, and ejection mechanism is partly assembled relatively difficulty, cause speed of production slower,, make easily that shell fragment pressure is too small to cause the incorrect engagement of cam mechanism because compressing tablet pressure be difficult for to adjust, or pressure is excessive to cause fast wearing and tearing and losing efficacy of cam mechanism, causes the reliability of connector and life-span all lower.Owing to lack the special structure that holds, the memory card that inserts is lacked effective fixing effect in addition, easily cause electronic cards in use to get rid of and take off, or occur flying card when moving back card.

[utility model content]

The purpose of this utility model is to provide a kind of electronic card coupler, can cooperate electronic cards that the storage and the exchange of information are provided, and can improve the assembling speed of connector, enhance productivity, also effective control pull rod pressure, make it have best engaging pressure, and then prolong the useful life of cam mechanism, have better reliability and stability; Can provide stable retain strength all the time to the electronic cards of inserting, can prevent that electronic cards from flying off.

The purpose of this utility model is realized by following technical scheme:

A kind of electronic card coupler of the present utility model, it includes insulating body, be arranged on the slide block that becomes to be slidingly matched with insulating body in the insulating body, one end is fixed on and holds the pull bar that is entrapped on the slide block on the insulating body in addition, one end is fixed on and holds the spring that connects this slide block on the insulating body in addition, at least one end fixes to hold in addition on insulating body presses the spring clip that touches this pull bar, one end fixes on insulating body in addition end for the servo-actuated that the holds electronics shell fragment that holds, and the metallic shield that is fastened on the insulating body is covered, it is characterized in that: this slide block is rectangular, this slide block has the bottom surface, medial surface, start face and lateral surface, front end face, rear end face, this start face is provided with the slideway repeatedly of asymmetrical shape, this repeatedly slideway have 4 sections ladder triangle inclined-planes, be respectively first inclined-plane, second inclined-plane, the 3rd inclined-plane and the 4th inclined-plane, there is vertical terrace perpendicular to start face on these four inclined-planes at its end, have in the slideway repeatedly at this to push away the primary importance of moving back start point, the second place, the 3rd position, the 4th position.

Described electronic card coupler, it is characterized in that: the bottom surface of this slide block is provided with slideway, the rear end of the medial surface of this slide block is provided with the card pushing block, this card pushing block has card and pushes away face, the front end face of this slide block is protruding with boss, and this slide block is provided with the shell fragment storage tank that holds, the ccontaining shell fragment that holds of this storage tank, be concaved with the sliding block spring pull bar on this slip front face, this pull bar holds the Access Division of spring.

Described electronic card coupler, it is characterized in that: this spring clip is the shell fragment that a center is formed with a narrow rectangular indentation, this shell fragment is provided with Access Division and elastic pressing part, this spring clip has first bending, second bending, the 3rd bending, this spring clip end has the formed flange of the 3rd bending, this flange can reduce friction when spring clip presses down pull bar, move in the cam slideway to help pull bar, this rectangular indentation runs through first bending and second bending, concentrates with the stress that reduces this two place.

Described electronic card coupler is characterized in that: this hold shell fragment and the mutual one fixing of slide block, to move with the electronic cards of slide block and insertion, and omnidistance electronic cards to insertion provides the fixing confining force.

Described electronic card coupler is characterized in that: this shell fragment end that holds has a projection that engages with groove on the electronic cards.

Electronic card coupler of the present utility model comprises several terminals, one group of L shaped position detecting terminal group, an insulating body, a cylindricality plane cam slide block, a pull bar, a spring, an elastic pressuring plate, servo-actuated hold shell fragment, a grounding elastic part and metallic shield lid;

Wherein, insulating body is the insulating body of a rectangle, the design feature of this insulating body is: be a rectangle colloid platy structure, edge, three limits along plane on this rectangle colloid platy structure of nationality, form a ㄇ shape zone to the tabular inside configuration translation of this rectangle colloid certain width, this ㄇ shape zone form a ㄇ shape bossing, and the integrally formed structure of this ㄇ shape bossing and this colloid rectangular slab is this insulating body along the certain thickness that raises up perpendicular to in-plane on the offset plate; The lower plane of above-mentioned rectangle colloid platy structure is the bottom surface of insulating body, and the last plane of rectangle colloid platy structure is the upper bottom surface of insulating body.

The design feature of above-mentioned ㄇ shape bossing is: the both sides bossing of this ㄇ shape constitutes the cursor slide and the support arm of insulating body respectively, mid portion forms top arm, this cursor slide, support arm and top arm all have the arm plane parallel with the insulating body bottom surface, and wherein cursor slide arm plane is identical with support arm arm level and be higher than top arm arm plane.The width on top arm arm plane is near the length of terminal, three medial surfaces of cursor slide, support arm and top arm (that is three medial surfaces of colloid rectangular slab) are the cursor slide medial surface of insulating body, insulating body inner face and support arm medial surface, and be respectively cursor slide lateral surface, insulating body rear end face, support arm lateral surface with this cursor slide medial surface, insulating body inner face, three lateral surfaces that the support arm medial surface is corresponding respectively; The end of cursor slide and support arm also has two arm end faces, and last lateral surface of this two arms end face and this rectangle colloid platy structure constitutes the ㄩ shape plane on same plane, is the insulating body front end face;

Above-mentioned top arm promptly constitutes the portion of terminal of insulating body, and this portion of terminal is formed with several terminal holes on the direction perpendicular to the bottom surface on the insulating body bottom surface, and this plurality of terminals hole connects to the portion of terminal of insulating body inside, is used for affixed several terminals.

The characteristics of support arm structure: the appropriate position on the support arm arm plane is provided with some storage tanks, be used for fixing L shaped detecting terminal group, whether whether this detecting terminal group can be detected electronic cards and insert and insert and put in place, simultaneously on the insulating body bottom surface of support arm downside, be provided with the ground strip slot, be used to be provided with ground strip, this connects egative film to realize the grounding function of electronic cards nationality;

The characteristics of cursor slide structure: the position of close insulating body rear end face is provided with pull bar and colludes the hole on the cursor slide arm plane, this pull bar is provided with the compressing tablet storage tank after colluding the hole, cursor slide arm plane and cursor slide inner plane cave inward together and form the cursor slide chute, and this chute is provided with insulating body spring pull bar near the position of insulating body front end face.This chute bottom is provided with a straight slide rail at least along the direction of plug-in card, to be equipped with in the slideway on the slide block slide block is slided on slide rail, at the distolateral slide block stop block that also is provided with of cursor slide;

The characteristics of slide block structure: slide block is a column structure of approximate cuboid, and four sides on this column structure length direction are bottom surface, medial surface successively, cam surface and lateral surface; Front end face at slide block is concaved with the sliding block spring pull bar, be provided with the electronic cards card pushing block of projection at the medial surface end of slide block, at least be concaved with the slideway of a perforation slide block front/rear end along the electronic cards direction of insertion in its bottom surface, then caving on the cam surface of this slide block has the cam slideway of a Y shape, and this Y cam slideway is a special quadravalence face slideway; The appropriate position is provided with the shell fragment storage tank that holds on the cam surface of this slide block, is used to be installed with the servo-actuated shell fragment that holds;

One pull bar: this pull bar is one to have the ㄇ shape bending structure of certain strength and stiffness, and this structure has the raker that one first bending part forms, the sliding bar that the middle pull bar body and second bending part form, and the sliding bar end has the good slide head of resistance to wear;

One spring clip: this L shaped elastic pressuring plate is the flexure strip of a bending, this flexure strip center is formed with a narrow rectangular indentation, this bending structure is divided into an Access Division and an elastic pressing part, this elastic pressing part forms one first bending and produces a downward kink to L shaped bending equidirectional, second bending that the terminal formation one of this kink is opposite with the wrap direction of L, this second bending forms a slip flange at elastic pressing part, and above-mentioned narrow rectangular indentation runs through the Access Division and first kink;

The one servo-actuated shell fragment that holds: this servo-actuated L shaped laminated structure of shell fragment that holds, and in the terminal appropriate position of this L shaped laminated structure, be provided with triangular shape bending projection perpendicular to the L face, take this to bend projection and hold electronic cards, this L shaped servo-actuated shell fragment that holds is inserted in the shell fragment storage tank that holds on the slide block admittedly, realize that the electronic cards of inserting is carried out servo-actuated to hold.

On the cursor slide lateral surface of insulating body and support arm lateral surface, convex with some wedge shape fixture blocks; on a metallic shield, also be formed with some hole clippings corresponding with the wedge shape fixture block; engaging by these some wedge shape fixture blocks and this hole clipping; the metallic shield bag is located at the connector outside, to the real shielding protection of connector internal electron circuit.

Hold shell fragment, grounding elastic part, metallic shield lid of above-mentioned insulating body, several terminals, L shaped position detecting terminal, plane cam slide block, pull bar, spring, L shaped elastic pressuring plate, servo-actuated can constitute a kind of electronic card coupler specific embodiment of the present utility model together.

Advantage of the present utility model is: the cam planes of slide block is located at the upper side of slide block, has reduced the size of connector, and makes that the actual assembled order of slide block trip mechanism is identical with desirable assembling sequence, improves production efficiency of products and qualification rate; Use independent L shaped elastic pressuring plate and flange is set at L shaped elastic pressuring plate front end, then both can in the process of the cam slideway engagement of the slide head of pull bar and slide block, provide reliable downforce, also can reduce pull bar in swing process and the force of sliding friction that produces between the compressing tablet, improve the stability and the life-span of product; Use the servo-actuated shell fragment that holds, insert in the process that connector and electronic cards be ejected with slide block in electronic cards, all the time electronic cards is held effect, accident is taken off card in promptly can preventing to use, and also can avoid getting rid of when moving back card card.

[description of drawings]

Fig. 1 is the explosive view of the connector of the utility model preferred embodiment;

Fig. 2 is the amplification plan view of the slide block of the utility model preferred embodiment;

Fig. 3 is the amplification rearview of the slide block of the utility model preferred embodiment;

Fig. 4 A is the three-dimensional view of surveying of amplification of the slide block of the utility model preferred embodiment;

Fig. 4 B is that four in the slideway repeatedly of slide block of the utility model preferred embodiment push away and move back start point position view.

Fig. 5 removes constitutional diagram behind the screen iron cover for the utility model preferred embodiment;

Fig. 6 inserts constitutional diagram after the electronic cards for the utility model preferred embodiment;

Fig. 7 moves back the cross-sectional schematic of card portion for the electronic card coupler of the utility model preferred embodiment;

Fig. 8 A, 8B are that the electronic card coupler of the utility model preferred embodiment pushes away-the work schematic diagram of plug-in card action; Fig. 8 C pushes away-the sliding position schematic diagram of the sliding bar of pull bar when plug-in card moves for the utility model preferred embodiment;

Fig. 9 A, 9B are the work schematic diagram that the electronic card coupler of the utility model preferred embodiment pushed away-moved back card motion.Fig. 9 C pushes away-the sliding position schematic diagram of the sliding bar of pull bar when moving back card motion for the utility model preferred embodiment;

[embodiment]

See also shown in Figure 1ly, electronic card coupler of the present utility model comprises: insulating body 1, several terminals 100, ground strip 9, detecting terminal group 8, slide block 2, spring 3, pull bar 4, the servo-actuated parts such as shell fragment 5, compressing tablet 6 and metallic shield lid 7 that hold; From figure, can learn, insulating body 1 is one to have the insulating part of rectangular configuration, the both sides bossing of the ㄇ shape on it has formed the cursor slide 16 of this insulating body 1 respectively, portion of terminal 18 and support arm 19, this cursor slide 16 is provided with chute 160, these chute 160 inner bottom sides are provided with slide rail 164, be provided with the slide block stop block 165 that Spring hanging rod 161 and anti-limited slip block 2 outwards skid off connector at the front end of this chute 160, then be provided with at the rear side of this chute 160 and collude hole 162 for pull bar 4 hooks, be used to cooperate pull bar 4, be provided with compressing tablet at this rear side that colludes hole 162 and be installed with hole 163, be used to be installed with compressing tablet 6; Be provided with plurality of terminals hole 181 in portion of terminal 18, these terminal holes 181 are used for ccontaining terminal 100 with quantity, support arm 19 is provided with detecting terminal storage tank 191, be used to be installed with detecting terminal group 8, all convex with some wedge shape fixture blocks 10 on the support arm lateral surface 13 of this support arm 19 and the cursor slide lateral surface 17 of cursor slide 16, this wedge shape fixture block 10 can engage with the hole clipping 71 that metallic shield is covered on 7, to be installed with metallic shield lid 7; Detecting terminal group 8 is the sheet metal of pair of L-shaped, and whether whether this terminal group 8 can be detected electronic cards 120 and insert and insert and put in place, and spring 3 has extension section 32 and Access Division 31;

Pull bar 4 has the raker 41 that first kink forms, the sliding bar 43 that the pull bar body 42 of mid portion and second bending part form, and sliding bar 43 ends have the good slide head of resistance to wear 431;

The servo-actuated shell fragment 5 that holds is a L shaped laminated structure, in the hold terminal appropriate location of L shaped laminated structure of shell fragment 5 of this servo-actuated, be provided with triangular shape bending card protruding 53 perpendicular to the L face, take this to bend card protruding 53 and hold the electronic cards of inserting in this connector, the hold other end of shell fragment 5 of this servo-actuated has the fixing end 51 that is used for inserting embedding;

Spring clip 6 is the shell fragment that a center is formed with a narrow rectangular indentation 66, this shell fragment is divided into Access Division 61 and elastic pressing part 65, this spring clip 6 has three bendings: first bending 62, second bending 64, end have the formed flange 67 of the 3rd bending, this flange 67 can reduce friction when spring clip presses down pull bar 4, moving in the cam slideway 20 repeatedly to help pull bar 4, rectangular indentation 66 runs through first bending 62 and second bending 64, concentrates with the stress that reduces this two place;

Metallic shield sheet 7 has the effect that screening electron disturbs, and can protect the terminal group 100 of electronic card coupler 180 inside to avoid near the interference of the electromagnetic signal that other electron component produces the connector.

Shown in Fig. 2,3,4A, 4B, slide block 2 is a roughly rectangular special construction, this slide block 2 has bottom surface 21, medial surface 22, start face 23 and lateral surface 24, front end face 25, rear end face 26, wherein, this start face 23 is corresponding with bottom surface 21, and 21 are provided with slideway 210 in the bottom surface, the rear end of medial surface 22 has card pushing block 27, this card pushing block 27 has card and pushes away face 271, and front end face 25 is protruding with boss 252, and the interior sliding surface 251 of this boss 252 can increase the intensity of slide block 2 in slip; The appropriate position has the shell fragment of holding storage tank 29 on the slide block 2, this storage tank 29 is used for the ccontaining shell fragment 5 that holds, be concaved with sliding block spring pull bar 291 on slide block 2 front end faces 25, this pull bar 291 can hold the Access Division 31 of spring 3, start face 23 is provided with the slideway repeatedly 20 of asymmetrical shape, this repeatedly slideway 20 have 4 sections special ladder triangle inclined-planes: first inclined-plane 201, second inclined-plane 202, the 3rd inclined-plane 203 and the 4th inclined-plane 204, there is vertical terrace perpendicular to start face 23 on these four inclined-planes at its end, has primary importance A in the slideway 20 repeatedly at this, second place B, the 3rd position C, the 4th position D etc. pushes away and moves back the start point, shown in Fig. 4 B.

During combination, earlier slide block 2 is placed the chute 160 of insulating body 1, and make the slideway 210 of slide block 2 cooperate the slide rail 164 on the cursor slide 16 to be arranged on the insulating body 1, slide block 2 can be free to slide in preset range back and forth along the plug-in card direction, again with two Access Divisions 31 of spring 3 respectively with insulating body 1 on insulating body Spring hanging rod 161 be connected with sliding block spring pull bar 29 on the slide block 2, under the tension of spring 3, the front end face 25 of slide block 2 compresses the stop block 165 of insulating body 1, this moment, start face 23 was towards the connector upside, the pull bar that the raker 41 of pull bar 4 is arranged at insulating body 1 colludes in the hole 162, the sliding bar 43 of pull bar 4 snaps in repeatedly the primary importance A place in the slideway 20, the Access Division 61 of spring clip 6 is fixedly arranged on being installed with in the hole 163 on the insulating body 1, the slip flange portion 67 that the 3rd bending of this elastic pressing part forms is pressed and is touched pull bar body 42, pull bar 4 is produced downforce, and the pull bar that this downforce fixes at insulating body 1 raker 41 of pull bar 4 colludes in the hole 162; Slide head 431 with sliding bar 43 ends is pressed against on the chute surface of slideway 20 simultaneously; to guarantee the sliding bar 43 and the correct engagement of slideway 20 repeatedly; simultaneously protruding unit partly also effectively reduces contact friction force; the servo-actuated compressing tablet that the fixing end 51 of shell fragment 5 is arranged on the insulating body 1 that holds is installed with in the hole 163, and protruding 53 projectioies of card of shell fragment 5 ends that hold are towards the connector inboard.Detecting terminal group 8 is fixedly arranged in the detecting terminal storage tank 191 on the support arm 19, terminal group 100 is located in the plurality of terminals hole 181, metallic shield lid 7 engages with wedge shape fixture block 10 mutually by hole clipping 71, be installed with metallic shield lid 7 on insulating body 1, form electronic card coupler 160 as shown in Figure 5.

Shown in Fig. 6,7,8A, 8B, 8C, 9A, 9B, 9C, for the utility model from plug-in card to the process of moving back card:

During plug-in card, electronic cards 120 is inserted in the process of electronic card coupler 180 of these utility models, electronic cards 120 at first contacts and the card of push card pushing block 27 pushes away face 271, the groove of presetting on card protruding 53 and the electronic cards 120 of shell fragment 5 that holds of servo-actuated simultaneously engages, thereby electronic cards is immobilizated in the electric power connector 180, continue to promote electronic cards 120, electronic cards 120 push card pushing blocks 27 and then promotion slide block 2 move to electronic card coupler 180 bottoms; Simultaneously spring 3 is stretched and stretches and energy storage, and the sliding bar 43 of sliding bar 43 ends of pull bar 4 moves to the B place along the A among Fig. 8 C → B slideway from the A of slideway 20 ends repeatedly in slideway 20 repeatedly; When slide block 2 arrives connector 180 bottoms, the sliding bar 43 of pull bar 4 also arrives repeatedly the B place of slideway 20, stop to promote and unclamping electronic cards 120 this moment, under the resilience force effect of spring 3, held the electronic cards 120 of shell fragment 5 fixings with the movement outside of slide block 2 to electronic card coupler 180, the also counter motion of sliding bar 43 of pull bar 4, this sliding bar 43 moves along B → C slideway owing to conflict vertical terrace and arrives the C place, and trip is in herein, electronic cards realizes being connected with the stable of connector under the fixing of retaining sheet 5, avoids electronic cards to throw away unexpectedly;

When moving back card: promote electronic cards 120 once more and in electronic card coupler 180, move, the sliding bar 43 of pull bar 4 moves upward once more, when C → D slideway arrives the D place, slide block 2 arrives the bottom of connector 180 once more, stop to push away card this moment, electronic cards 120 withdraws under the resilience force effect of spring 3, sliding bar 43 is back to the A place owing to conflict vertical terrace along D → A slideway, thereby promote electronic cards 120 and withdraw from connector 180, hold simultaneously bullet all the time the fixing electronic cards to prevent that electronic cards from being launched action and throwing away connector 180.

In the utility model the cam surface of slide block 2 is located at the upper side of slide block 2, reduce the positive size of connector, and be convenient to assemble, the raker of pull bar is fixed on the insulating body, make the engagement of pull bar and slide block more stable, compressing tablet is beneficial to the convenient pressure that provides reliable and stable, has prolonged the useful life of product.

Claims (5)

1. electronic card coupler, it includes insulating body, be arranged on the slide block that becomes to be slidingly matched with insulating body in the insulating body, one end is fixed on and holds the pull bar that is entrapped on the slide block on the insulating body in addition, one end is fixed on and holds the spring that connects this slide block on the insulating body in addition, at least one end fixes to hold in addition on insulating body presses the spring clip that touches this pull bar, one end fixes on insulating body in addition end for the servo-actuated that the holds electronics shell fragment that holds, and the metallic shield that is fastened on the insulating body is covered, it is characterized in that: this slide block is rectangular, this slide block has the bottom surface, medial surface, start face and lateral surface, front end face, rear end face, this start face is provided with the slideway repeatedly of asymmetrical shape, this repeatedly slideway have 4 sections ladder triangle inclined-planes, be respectively first inclined-plane, second inclined-plane, the 3rd inclined-plane and the 4th inclined-plane, there is vertical terrace perpendicular to start face on these four inclined-planes at its end, have in the slideway repeatedly at this to push away the primary importance of moving back start point, the second place, the 3rd position, the 4th position.

2. electronic card coupler as claimed in claim 1, it is characterized in that: the bottom surface of this slide block is provided with slideway, the rear end of the medial surface of this slide block is provided with the card pushing block, this card pushing block has card and pushes away face, the front end face of this slide block is protruding with boss, and this slide block is provided with the shell fragment storage tank that holds, the ccontaining shell fragment that holds of this storage tank, be concaved with the sliding block spring pull bar on this slip front face, this pull bar holds the Access Division of spring.

3. electronic card coupler as claimed in claim 1, it is characterized in that: this spring clip is the shell fragment that a center is formed with a narrow rectangular indentation, this shell fragment is provided with Access Division and elastic pressing part, this spring clip has first bending, second bending, the 3rd bending, this spring clip end has the formed flange of the 3rd bending, and this rectangular indentation runs through first bending and second bending.

4. electronic card coupler as claimed in claim 1 is characterized in that: this hold shell fragment and the mutual one fixing of slide block.

5. electronic card coupler as claimed in claim 1 is characterized in that: this shell fragment end that holds has a projection that engages with groove on the electronic cards.

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