Connecting assembly, connecting system and mold

Abstract

The utility model discloses a connecting assembly, a connecting system and a mould, a clamping groove piece comprises a clamping groove piece body, a front groove is formed in the front side face of the clamping groove piece body, and a rear groove is formed in the rear side face of the clamping groove piece body. At least one part of the groove bottom of the rear side of the front groove is communicated with at least one part of the groove bottom of the front side of the rear groove, an unlocking part is formed on the inner wall of the upper side of the front groove and / or the inner wall of the upper side of the rear groove, and the unlocking part comprises an unlocking face gradually inclining backwards from top to bottom. A flange part is formed on the inner wall of the left side and / or the inner wall of the right side and / or the inner wall of the lower side of the front groove; wherein the front groove is used for being matched with a mold to demold in the front-back direction, the rear groove is used for being matched with the mold to demold in the front-back direction, and the clamping groove piece is connected with the telescopic clamping tenon.

Description

TECHNICAL FIELD

[0001] The utility model relates to a connecting assembly, a connecting system and a mold, and the connecting assembly is used for connecting a layer plate and a cabinet body, in particular for connecting furniture components. BACKGROUND

[0002] At present, with the continuous improvement of people's aesthetic concept, the two furniture plate pieces gradually adopt a hidden form connecting piece to realize hidden form connection, thereby improving the appearance of furniture or equipment. For example, the existing layer plate is installed in the cabinet body by using a layer plate support connecting assembly, the layer plate is detachably installed in the cabinet body through the layer plate support connecting assembly, and the layer plate support connecting assembly cannot be observed outside the cabinet body or the layer plate, thereby realizing the hidden connection between the layer plate and the cabinet body. At the same time, the disassembly and assembly of the layer plate do not need to use additional tools, and the disassembly and assembly are convenient.

[0003] For example, the Chinese patent application No. CN202211715955.6 discloses a connecting assembly and a connecting system, and the layer plate and the cabinet body are detachably connected through a clamping groove piece and a telescopic tenon, and the clamping groove piece and the telescopic tenon cannot be observed from the outside, thereby having high invisibility. However, the clamping groove piece needs to be demolded in the front-rear direction and the left-right direction by using a mold, the demolding step is relatively complicated, the demolding efficiency is relatively low, and the manufacturing cost of the mold is high. In other words, when the cost of the mold needs to be controlled within a certain range, the number of clamping groove pieces produced by each mold will be very low, thereby relatively increasing the cost of the clamping groove piece and affecting the market promotion of the hidden connecting assembly, so that the market share of the hidden connecting assembly is relatively low. In addition, the clamping groove piece body is formed with a through hole, and the through hole is used for passing a fastener to install the clamping groove piece on the side plate of the furniture cabinet. The fastener is generally a screw or a bolt or a self-tapping screw. During the process of inserting (including rotating insertion) the screw or the bolt or the self-tapping screw into the side plate of the furniture cabinet, fine chips will be released in the opposite direction or the side plate of the furniture cabinet will be deformed in the opposite direction, so that the clamping groove piece is lifted to produce a misalignment, which will make the layer plate and the cabinet side plate of the furniture unable to be disassembled or will cause a gap after the layer plate and the cabinet side plate are installed. SUMMARY

[0004] To solve the above-mentioned existing invisible layer board support needs to be separated from the front and rear direction and other directions, and the demolding is troublesome and the demolding efficiency is low, and in the process of installing the clamping groove part to the side plate of the furniture cabinet, the fine particles are released in the opposite direction or the side plate of the furniture cabinet is deformed in the opposite direction, which causes misplacement, affects the installation of the furniture plates or the unattractive installation after the installation, the utility model discloses a first aspect provides a kind of connecting assembly, including clamping groove part body, the front side of the clamping groove part body is formed with front recess, the rear side of the clamping groove part body is formed with rear recess, at least a portion of the rear side groove bottom of the front recess is connected with at least a portion of the front side groove bottom of the rear recess, the upper side inner wall of the front recess and / or the upper side inner wall of the rear recess is formed with unlocking portion, the unlocking portion includes gradually backward inclined unlocking surface from top to bottom, the left side inner wall and / or right side inner wall and / or lower side inner wall of the front recess is formed with flange portion;

[0005] Wherein, the clamping groove part is used for: cooperation mold is demolded along front and rear direction, and the mold does not need to have the core and / or mold body in other directions except front and rear direction;

[0006] Further including telescopic tenon, the telescopic tenon includes connecting portion, outer cylinder portion and the elastic portion arranged in the outer cylinder portion, one end of the elastic portion is connected with the outer cylinder portion, the other end of the elastic portion is connected with the connecting portion, the connecting portion is reciprocating telescopic relative to the outer cylinder portion through the elastic portion, the outer cylinder portion is used to be fixedly installed to one side of second furniture plate, one end of the connecting portion deviating from the elastic portion is inserted into the front recess, and the connecting portion can slide from top to bottom in the front recess.

[0007] In some embodiments, the clamping groove part body is formed with a through hole, both ends of the through hole respectively penetrate the front side and the rear side of the clamping groove part body, and the through hole is used for the fastener to pass through to fasten the clamping groove part body on the first furniture plate.

[0008] In some embodiments, the clamping groove part body is formed with a chip groove at the rear end opening of the through hole.

[0009] In some embodiments, the flange portion of the left side inner wall of the front recess includes a left inclined surface gradually inclined to the right from top to bottom, and the flange portion of the right side inner wall of the front recess includes a right inclined surface gradually inclined to the left from top to bottom.

[0010] In some embodiments, at least a portion of the left side inner wall of the rear recess is gradually inclined to the right from top to bottom, and at least a portion of the right side inner wall of the rear recess is gradually inclined to the left from top to bottom, so as to make a part of the telescopic tenon smoothly slide from top to bottom after being inserted into the front recess.

[0011] In some embodiments, the flange portion is formed with a clamping portion near the lower side wall of the front groove.

[0012] The first aspect of the utility model has the advantages that compared with the prior art, the utility model has the beneficial effects of:

[0013] The front groove and the rear groove of the clamping groove piece are distributed along the front-rear direction, the structure shape of the front groove is set to match the structure shape of a part of the front mold body of the mold, the structure shape of the rear groove is set to match the structure shape of a part of the rear mold body of the mold, so that the mold can be demolded along the front-rear direction to form the front groove and the rear groove, the mold does not need to have a core and / or a mold body in other directions except the front-rear direction, so that a complete clamping groove piece is prepared, the flange portion is formed by the front groove and the rear groove in communication, the demolding is simple and the demolding efficiency is high, the cost of the mold is reduced, and / or the production efficiency of the clamping groove piece is higher due to the simple structure of the mold, so that the production cost of the clamping groove piece is lower, and the market promotion and the market share of the connecting assembly are facilitated.

[0014] In addition, the clamping groove piece body is formed with a chip groove at the rear end opening of the through hole, so that during the process of inserting (including rotating insertion) the screw or bolt or self-tapping screw into the furniture plate, the fine chips in the reverse direction or the reverse deformation of the furniture plate can be accommodated in the chip groove, so that the clamping groove piece will not be dislocated due to the fine chips or the reverse deformation of the first furniture plate, so that the first furniture plate and the second furniture plate can be disassembled accurately and conveniently, or the first furniture plate and the second furniture plate will not produce gaps after installation.

[0015] In some embodiments, one end of the connecting portion away from the elastic portion is formed with a connecting boss, the connecting boss is inserted into the front groove, and the flange portion cooperates with the connecting boss to limit the pulling out or moving out of the connecting boss from the front groove.

[0016] The third aspect of the utility model provides a connecting system, which comprises a first furniture plate, a second furniture plate and a connecting assembly as described above.

[0017] One side of the first furniture plate is formed with a mounting groove, one side of the second furniture plate is formed with a mounting hole, and the second furniture plate can move along the up-down direction relative to the first furniture plate.

[0018] The clamping groove piece is mounted in the mounting groove, and the telescopic clamping tenon is mounted in the mounting hole.

[0019] When the second furniture plate moves downward relative to the first furniture plate, the connecting portion moves downward in the front groove.

[0020] The fourth aspect of the utility model provides a mould for preparing the card slot piece as described above, the mould includes front mould body and rear mould body, the mould does not need to have the core and / or mould body of other direction, the front mould body can be relative to the rear mould body along the front-back direction and is demoulded, and the card slot piece is made by the front mould body and the rear mould body along the front-back direction and is demoulded. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the first kind of structural schematic diagram of the card slot piece of the utility model;

[0022] Figure 2 It is Figure 1 The structural schematic diagram of observing from behind;

[0023] Figure 3 It is Figure 1 The sectional view of

[0024] Figure 4 It is the second kind of structural schematic diagram of the card slot piece of the utility model;

[0025] Figure 5 It is Figure 4 The structural schematic diagram of observing from behind;

[0026] Figure 6 It is the third kind of structural schematic diagram of the card slot piece of the utility model;

[0027] Figure 7 It is Figure 6 The structural schematic diagram of observing from behind;

[0028] Figure 8 It is the fourth kind of structural schematic diagram of the card slot piece of the utility model;

[0029] Figure 9 It is Figure 8 The structural schematic diagram of observing from behind;

[0030] Figure 10 It is the fifth kind of structural schematic diagram of the card slot piece of the utility model;

[0031] Figure 11 It is Figure 10 The structural schematic diagram of observing from behind;

[0032] Figure 12 It is the sixth kind of structural schematic diagram of the card slot piece of the utility model;

[0033] Figure 13 It is Figure 12 The structural schematic diagram of observing from behind;

[0034] Figure 14 It is the structural schematic diagram of the connecting assembly of the utility model;

[0035] Figure 15 is a structural schematic view of the telescopic dowel of the utility model;

[0036] Figure 16 is Figure 15 a sectional view.

[0037] BRIEF DESCRIPTION OF DRAWINGS

[0038] 1, the clamping groove piece; 11, the front groove; 12, the rear groove; 13, the unlocking part; 131, the unlocking surface; 14, the flange part; 141, the left inclined surface; 142, the right inclined surface; 15, the perforation; 16, the chip pocket; 17, the clamping part;

[0039] 2, the telescopic dowel; 21, the connecting part; 22, the outer cylinder part; 23, the elastic part. DETAILED DESCRIPTION

[0040] The specific embodiments of the utility model are described in further detail below in conjunction with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0041] The structure, proportion, size and the like shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, to enable persons skilled in the art to understand and read, and are not used to limit the limiting conditions that can be implemented by the utility model, so they do not have substantial technical significance. Any modification of structure, change of proportional relationship or adjustment of size, without affecting the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the present specification are only for the convenience of clear description, and not to limit the scope of the utility model that can be implemented, the change or adjustment of relative relationship, without substantial change of technical content, is also regarded as the scope of the utility model that can be implemented.

[0042] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0043] In the utility model, unless otherwise expressly provided and limited, the terms "mounting", "connection", "connection" and other terms should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0044] In the utility model, the cabinet body is, for example, furniture cabinet or wardrobe or cabinet or chest cabinet or book cabinet, in order to improve the space utilization of the cabinet body, at least one layer plate is arranged in the cabinet body, wherein the utility model does not limit the specific material of the cabinet body and the layer plate, and the material is, for example, wood, plastic, metal or high polymer synthetic material or its combination, when assembling, the opposite sides of the layer plate are connected with the opposite inner side walls of the cabinet body through the connecting assembly respectively, so that the layer plate is mounted in the cabinet body. In addition, in the utility model, the layer plate and the cabinet plate or the side plate are relative concepts, that is, the layer plate recorded in the embodiment of the utility model is only a detachable plate opposite to the cabinet plate or the side plate, and the person skilled in the art can convert the positions of the layer plate and the cabinet plate or the side plate according to the actual use, so that the conversion of the layer plate and the cabinet plate or the side plate belongs to the conventional technical means replacement. Further, in the utility model, one side plate of the cabinet body is set as the first furniture plate, and the layer plate is set as the second furniture plate.

[0045] In the prior art, the technical problem in the background art appears.

[0046] In order to solve the above technical problems, as shown in the background art, Figures 1 to 16 As shown in the utility model embodiment, a clamping groove piece 1 is disclosed, which comprises a clamping groove piece body, a front recess 11 is formed on the front side of the clamping groove piece body, a rear recess 12 is formed on the rear side of the clamping groove piece body, at least a part of the rear side groove bottom of the front recess 11 is communicated with at least a part of the front side groove bottom of the rear recess 12, an unlocking portion 13 is formed on the upper side inner wall of the front recess 11 and / or the upper side inner wall of the rear recess 12, the unlocking portion 13 comprises an unlocking surface 131 which gradually inclines backward from top to bottom, a flange portion 14 is formed on the left side inner wall and / or the right side inner wall and / or the lower side inner wall of the front recess 11; wherein the front recess 11 is used for matching a part of the front mold body of the mold for demolding in the front-rear direction (not shown in the figure), and the rear recess 12 is used for matching a part of the rear mold body of the mold for demolding in the front-rear direction (not shown in the figure).

[0047] In the utility model, the card slot piece 1 is used in cooperation with the telescopic tenon 2, and the structure of the telescopic tenon 2 can be, for example, the telescopic tenon 2 in the connecting assembly and connecting system disclosed in Chinese patent application No. CN202211715955.6, and the description is omitted here. In use, the card slot piece 1 is installed on the first furniture plate, and the telescopic tenon 2 is installed on the second furniture plate, and the second furniture plate can move in the up-down direction relative to the first furniture plate. Further, as shown in the drawings, the front-rear direction of the card slot piece 1 is the left-right direction of the second furniture plate relative to the first furniture plate after the card slot piece 1 is installed on the first furniture plate, and the left-right direction of the card slot piece 1 is the front-rear direction of the second furniture plate relative to the first furniture plate after the card slot piece 1 is installed on the first furniture plate.

[0048] It can be understood that, due to the unlocking portion 13 in the interior of the front groove 11 and / or the rear groove 12, and the flange portion 14 in the interior of the front groove 11, so that the structural shape of the front groove 11 is different from the structural shape of the rear groove 12, the rear side of the front groove 11 is connected to the front side of the rear groove 12 to form a continuous channel, therefore the utility model does not distinguish or limit the specific structure or shape of the front groove 11 and the rear groove 12, and is specifically matched according to the design of the mold, that is, a part of the front groove 11 can belong to a part of the rear groove 12, and a part of the rear groove 12 can belong to a part of the front groove 11. For example, the projection area formed by the side edges of the flange portions 14 on the left and right sides of the card slot piece 1 is enclosed between the front side of the unlocking portion 13 to form the front groove 11, and is enclosed between the rear side of the flange portion 14 and the rear side of the card slot piece body to form the rear groove 12; for another example, the projection area formed by the side edges of the flange portions 14 on the left and right sides of the card slot piece 1 is enclosed between the front side of the unlocking portion 13 and the rear side of the card slot piece 1 to form the front groove 11, and the remaining part is the rear groove 12. Therefore, the structural shape of the front groove 11 and the structural shape of the rear groove 12 of the utility model embodiment are specifically designed according to the relative design of the front mold body and the rear mold body.

[0049] The structure of the card slot piece 1 can be in the shape of a racetrack, a waist circle or a circle, and correspondingly, the installation groove of the first furniture plate is also in the shape of a racetrack, a waist circle or a circle.

[0050] Based on the above technical solution, the front groove 11 and the rear groove 12 of the card slot piece 1 are distributed in the front-rear direction, the structural shape of the front groove 11 is set to be matched with the structural shape of the corresponding part of the mold, the structural shape of the rear groove 12 is set to be matched with the structural shape of the corresponding part of the mold, so that the mold can be demolded in the front-rear direction to form the front groove 11 and the rear groove 12, the mold does not need to have a core and / or a mold body in other directions except the front-rear direction, so that the complete card slot piece 1 can be prepared, the flange portion 14 is formed by the continuous front groove 11 and the rear groove 12, and the demolding is simple and has high demolding efficiency.

[0051] In some embodiments, the card slot body is formed with a through hole 15, the two ends of the through hole 15 respectively penetrating the front side and the rear side of the card slot body, the through hole 15 is used for the fastener to pass through to fasten the card slot body on the first furniture plate. The fastener is, for example, a conventional screw or bolt or self-tapping screw, and the card slot 1 is fastened on the first furniture plate by the fastener, which improves the transverse tensile force (the tensile force of the first furniture plate and the second furniture plate in the left-right direction) of the first furniture plate and the second furniture plate, and improves the stability of the whole furniture cabinet. The number of through holes 15 can be one or more. Correspondingly, the mold also has front and / or rear core pulling members corresponding to the through holes 15, and the through holes 15 are formed when the mold is demolded in the front-rear direction.

[0052] In some embodiments, the card slot body is formed with a through hole 15, the two ends of the through hole 15 respectively penetrating the front side and the rear side of the card slot body, the through hole 15 is used for the fastener to pass through to fasten the card slot body on the first furniture plate. The fastener is, for example, a conventional screw or bolt or self-tapping screw, and the card slot 1 is fastened on the first furniture plate by the fastener, which improves the transverse tensile force (the tensile force of the first furniture plate and the second furniture plate in the left-right direction) of the first furniture plate and the second furniture plate, and improves the stability of the whole furniture cabinet. The number of through holes 15 can be one or more. Correspondingly, the mold also has front and / or rear core pulling members corresponding to the through holes 15, and the through holes 15 are formed when the mold is demolded in the front-rear direction.

[0053] In some embodiments, the flange part 14 of the left inner wall of the front groove 11 comprises a left inclined surface 141 gradually inclined to the right from top to bottom, and the flange part 14 of the right inner wall of the front groove 11 comprises a right inclined surface 142 gradually inclined to the left from top to bottom. The distance between the upper side of the left inclined surface 141 and the upper side of the right inclined surface 142 is greater than the width of the connecting part 21 of the telescopic tenon 2. When there is a position error in the mounting groove of the first furniture plate or the mounting hole of the second furniture plate, the connecting part 21 can also be smoothly inserted into the upper side of the front groove 11. When the second furniture plate is moved downward for assembly relative to the first furniture plate, the connecting part 21 also moves downward in the front groove 11. Due to the position error of the mounting groove of the first furniture plate or the mounting hole of the second furniture plate, the connecting part 21 abuts against the left inclined surface 141 or the right inclined surface 142. During the downward movement of the connecting part 21, the clamping groove piece 1 is driven to slide rightward or leftward in the mounting groove, thereby adjusting the mounting position of the clamping groove piece 1 on the first furniture plate, so that the connecting part 21 can smoothly move to the lower inner wall of the front groove 11, and then the second furniture plate is smoothly mounted to the inner side wall of the first furniture plate. In this way, the appropriate position of the clamping groove piece 1 on the first furniture plate is adjusted by the cooperation between the connecting part 21 and the left inclined surface 141 or the right inclined surface 142, which effectively ensures that the second furniture plate can be smoothly mounted to the first furniture plate when there is a left-right position error in the mounting groove of the clamping groove piece 1, avoids the trouble of re-drilling holes on the first furniture plate or the second furniture plate after disassembling the connecting assembly, and is convenient and efficient to install. The use of the connecting assembly of the utility model can improve the hole tolerance rate of the first furniture plate or the second furniture plate, and ensure that the second furniture plate is smoothly mounted to the inner side wall of the first furniture plate. In addition, after the second furniture plate is mounted on the first furniture plate, the telescopic tenon 2 on the second furniture plate is limited in the front-rear direction by the clamping groove piece 1, which effectively prevents the telescopic tenon 2 from being pulled out of the clamping groove piece 1 in the front-rear direction, thereby preventing the second furniture plate from being pulled outwards under stress, and improving the safety in use.

[0054] In some embodiments, at least a portion of the left inner wall of the rear groove 12 is gradually inclined to the right from top to bottom, and at least a portion of the right inner wall of the rear groove 12 is gradually inclined to the left from top to bottom, so as to enable a part of the telescopic tenon 2 to be smoothly slid downward from top to bottom after being inserted into the front groove 11, and improve the sliding smoothness of the connecting part 21 of the telescopic tenon 2 in the front groove 11.

[0055] In some embodiments, the flange part 14 is formed with a clamping part 17 near the lower side wall of the front groove 11, and the clamping part 17 cooperates with the connecting part 21 of the telescopic tenon 2, so that when the second furniture plate is in a stationary state, the second furniture plate is stably mounted on the first furniture plate and is difficult to be separated from the first furniture plate when subjected to an external force, thereby improving the connection stability of the second furniture plate and the first furniture plate.

[0056] Further, the utility model also provides a kind of connecting assembly, including telescopic tenon 2 and above clamping groove piece 1;Telescopic tenon 2 includes connecting portion 21, outer tube portion 22 and the elastic portion 23 being arranged in outer tube portion 22, the one end of elastic portion 23 is connected with outer tube portion 22, the other end of elastic portion 23 is connected with connecting portion 21, connecting portion 21 is reciprocating telescopic relative to outer tube portion 22 by elastic portion 23, outer tube portion 22 is used to be fixedly installed to the side of second furniture board, the one end of connecting portion 21 deviating from elastic portion 23 is inserted into front groove 11, and connecting portion 21 can be slid from top to bottom in front groove 11.The structure of telescopic tenon 2 in the connecting assembly and connecting system of the utility model is as the same as the telescopic tenon 2 in the connecting assembly and connecting system of Chinese patent application No.

[0057] Further, in some embodiments, the one end of connecting portion 21 deviating from elastic portion 23 is formed with connecting boss, connecting boss is inserted into front groove 11, flange portion 14 cooperates with connecting boss to limit to limit connecting boss from pulling out or moving out of front groove 11.

[0058] Further, the utility model also provides a kind of connecting system, including first furniture board, second furniture board and above connecting assembly;The side of first furniture board is formed with installation groove, the shape of installation groove is same or similar with the outer periphery shape of clamping groove piece 1, so that clamping groove piece 1 is installed in installation groove, the side of second furniture board is formed with mounting hole, and second furniture board can be moved along up-down direction relative to first furniture board;Telescopic tenon 2 is installed in mounting hole;When second furniture board is moved downward relative to first furniture board, connecting portion 21 is moved downward in front groove 11.The principle that the first furniture board and the second furniture board of the utility model are connected by the clamping groove piece 1 and telescopic tenon 2 please refer to the connecting assembly and connecting system of Chinese patent application No.

[0059] Further, the utility model also provides a kind of mould, for preparing above clamping groove piece 1, mould includes front mould body and rear mould body, the mould does not need to extract core and / or mould body in other direction except front-back direction, and front mould body and rear mould body can be relatively moulded and demoulded along front-back direction;Clamping groove piece 1 is only made by front mould body and rear mould body along front-back direction demoulding.

[0060] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of protection of the present application is defined by the claims and their equivalents.

Claims

1. A connection assembly, characterized in that The card slot piece comprises a card slot piece body, a front recess is formed on the front side of the card slot piece body, a rear recess is formed on the rear side of the card slot piece body, at least a part of the rear side groove bottom of the front recess is communicated with at least a part of the front side groove bottom of the rear recess, an unlocking portion is formed on the upper side inner wall of the front recess and / or the upper side inner wall of the rear recess, the unlocking portion comprises an unlocking surface which gradually inclines rearward from top to bottom, a flange portion is formed on the left side inner wall and / or the right side inner wall and / or the lower side inner wall of the front recess; The card slot piece is used for cooperating with a mold to demold in the front-rear direction, and the mold does not need to be drawn in other directions and / or the mold body is not needed. The telescopic tenon comprises a connecting portion, an outer cylinder portion and an elastic portion arranged in the outer cylinder portion, one end of the elastic portion is connected with the outer cylinder portion, the other end of the elastic portion is connected with the connecting portion, the connecting portion reciprocates relative to the outer cylinder portion through the elastic portion, the outer cylinder portion is used for being fixedly installed on one side of the second furniture plate, one end of the connecting portion away from the elastic portion is inserted into the front recess, and the connecting portion can slide in the front recess from top to bottom.

2. The connection assembly of claim 1, wherein, The card slot piece body is formed with a through hole, two ends of the through hole respectively penetrate the front side and the rear side of the card slot piece body, and the through hole is used for allowing a fastener to pass through to fasten the card slot piece body on the first furniture plate.

3. The connection assembly of claim 2, wherein, The card slot piece body is formed with a chip groove at the rear end opening of the through hole.

4. The connection assembly of claim 1, wherein, The flange portion of the left side inner wall of the front recess comprises a left inclined surface which gradually inclines rightward from top to bottom, and the flange portion of the right side inner wall of the front recess comprises a right inclined surface which gradually inclines leftward from top to bottom.

5. The connection assembly of claim 1, wherein, At least a part of the left side inner wall of the rear recess gradually inclines rightward from top to bottom, and at least a part of the right side inner wall of the rear recess gradually inclines leftward from top to bottom, so as to allow a part of the telescopic tenon to be inserted into the front recess and then smoothly slide downward from top to bottom.

6. The connection assembly of claim 1, wherein, The flange portion is formed with a clamping portion close to the lower side side wall of the front recess.

7. The connection assembly of claim 1, wherein, One end of the connecting portion away from the elastic portion is formed with a connecting boss, the connecting boss is inserted into the front recess, and the flange portion cooperates with the connecting boss to limit the connecting boss from being pulled out or moved out of the front recess.

8. A connection system, characterized in that The connecting assembly comprises a first furniture plate, a second furniture plate and the connecting assembly as claimed in any one of claims 1-7. One side of the first furniture plate is formed with a mounting groove, one side of the second furniture plate is formed with a mounting hole, and the second furniture plate can move relative to the first furniture plate in the up-down direction. The card slot piece is installed in the mounting groove, and the telescopic tenon is installed in the mounting hole. When the second furniture plate moves downward relative to the first furniture plate, the connecting portion moves downward in the front recess.

9. A mould for producing a card channel according to any one of claims 1-8, characterised in that, The mold comprises a front mold body and a rear mold body, the mold does not need to be drawn in other directions and / or the mold body is not needed, the front mold body and the rear mold body can be relatively closed and demolded in the front-rear direction, and the card slot piece is made by being demolded in the front-rear direction through the front mold body and the rear mold body.

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