Hidden crosspiece mortise and tenon joint structure for preventing plate from cracking or stretching

Abstract

The utility model relates to a hidden crosspiece mortise and tenon joint structure for preventing plate cracking or stretching, which comprises at least two base plates and a plurality of connecting pieces, the bottom surface of each base plate is provided with a plurality of clamping grooves, one end of each clamping groove penetrates through the corresponding base plate to form an insertion opening, and one side edge of each base plate and one end, far away from the insertion opening, of each clamping groove form a limiting part. Each connecting piece comprises a joggle joint part matched with the corresponding clamping groove and a block body located above the joggle joint part, receding openings are formed between the lower bottom faces of the two sides of each block body and the joggle joint parts, the joggle joint parts at the two ends of each connecting piece are clamped into the clamping grooves of the two adjacent base plates respectively, the joggle joint parts abut against the interiors of the clamping grooves, and the receding openings cover the limiting parts. According to the crosspiece mortise and tenon joint structure capable of preventing the plate from cracking or stretching out and drawing back, the mortise joint part is hidden on the inner side of the base plate, the phenomenon that mortise joint wood can contract or crack after an existing mortise and tenon joint structure is used for a long time is solved, and therefore the technical problem that due to the fact that the two ends of a connecting piece protrude out of the base plate, a mortise joint object is not attractive enough is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mortise and tenon structures, and in particular relates to a concealed mortise and tenon structure for preventing a plate from cracking or expanding and contracting. Background Art

[0002] Common connection methods between components in the prior art include welding, bolt connection and mortise and tenon connection. In the connection structure of wooden products, when two pieces of wood or bamboo boards need to be relatively connected and fixed, mortise and tenon structure is generally used for connection.

[0003] At present, the existing mortise and tenon structure will shrink or crack the wood in the mortise and tenon structure after long-term use, causing the ends of the connecting parts to protrude more or less from the base plate, making the mortise and tenon structure less beautiful. Utility Model Content

[0004] The purpose of the utility model is to provide a concealed mortise and tenon structure that can prevent a plate from cracking or stretching, so as to solve the above-mentioned technical problems.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a concealed mortise and tenon structure for preventing the cracking or expansion of the plate, comprising at least two base boards and a plurality of connecting parts, wherein a plurality of slots are provided on the bottom surface of the base board, one end of the slot passes through the base board to form an insertion port, a side edge of the base board and an end of the slot away from the insertion port form a limiting portion, the connecting part comprises a mortise and tenon portion cooperating with the slot and a block located above the mortise and tenon portion, an avoidance opening is provided between the lower bottom surfaces on both sides of the block and the mortise and tenon portion, the mortise and tenon portions at both ends of the connecting part are respectively inserted into the slots of the two adjacent base boards and the mortise and tenon portion abuts against the slot, and the avoidance opening cover is covered on the limiting portion.

[0006] Furthermore, the slot is trapezoidal in shape, and a semicircular inner groove is formed at one end of the slot away from the insertion port. When the mortise and tenon portion is mortised in the slot, the arc wall of the inner groove and the mortise and tenon portion abut to complete the limiting.

[0007] Furthermore, arc-shaped side edges are formed at both ends of the block, and the avoidance opening is correspondingly arranged below the arc-shaped side edges.

[0008] Furthermore, the mortise and tenon joint and the block are integrally formed, and the shape of the mortise and tenon joint is a trapezoidal shape that matches the insertion port.

[0009] Furthermore, an upper opening is provided above the slot to facilitate movement of the connector.

[0010] Furthermore, the height of the mortise and tenon joint is equal to the depth of the slot.

[0011] Furthermore, the substrate and the connecting piece are made of the same material.

[0012] Furthermore, the length of the connecting member is less than or equal to the width of the two substrates after being joined.

[0013] Through the above technical solution, the utility model has the following beneficial effects compared with the prior art: a card slot is provided on the bottom plate of the substrate, and the card slot does not pass through the substrate so that a limited position portion is reserved between the substrate and the substrate; at the same time, the connector is composed of a mortise and tenon portion and a block; the mortise and tenon portion slides in the card slot of the substrate, and the block is integrally formed with the mortise and tenon portion to facilitate pulling out the mortise and tenon portion; the length of the mortise and tenon portion is shorter than the length of the block; and there is an avoidance opening between the lower bottom surface on both sides of the block and the mortise and tenon portion, and the avoidance opening and the limit portion cooperate; when in use, the mortise and tenon portion of the connector is first inserted into the card slot of the substrate through the insertion port of one of the substrates, and slides inward along the card slot until one end of the mortise and tenon portion and the card slot are engaged. The inner wall of the connecting piece abuts against the inner wall of the connecting piece to limit the further forward movement of the mortise and tenon portion. At this time, the avoidance cover on one side of the connecting piece covers the limiting portion of this substrate, and then the other end of the mortise and tenon portion is inserted into the card slot of the other substrate in the same way, and slides inward until it abuts against the inner wall of the groove of this substrate to complete the limiting. When the two ends of the connecting piece are respectively inserted into the card slots of the two substrates, the mortise and tenon connection between the substrates is completed. The mortise and tenon structure formed in the above manner hides the mortise and tenon portion on the inner side of the substrate, so that the mortise and tenon object will not crack or shrink after long-term use, thereby solving the technical problem that the two ends of the connecting piece of the existing mortise and tenon object protrude from the substrate, resulting in the mortise and tenon object being not beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the structure of the utility model in an assembled state;

[0016] Figure 2 This is a schematic diagram of the bottom structure of the utility model in a disassembled state;

[0017] Figure 3 This is a schematic diagram of the top structure of the utility model in a disassembled state;

[0018] Figure 4 It is an internal cross-sectional view of the utility model;

[0019] The utility model number information is as follows:

[0020] 1. Base plate; 2. Connector; 101. Slot; 102. Insertion port; 103. Position limiting portion; 201. Mortise and tenon joint; 202. Block; 203. Avoidance port; 204. Arc-shaped side;

[0021] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following is a combination of the appended examples of the present invention Figure 1-4 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0025] like Figure 1-4 As shown: A concealed mortise and tenon structure for preventing the cracking or expansion of the plate comprises at least two base plates 1 and a plurality of connectors 2. A plurality of slots 101 are provided on the bottom surface of the base plate 1. One end of the slot 101 passes through the base plate 1 to form an insertion port 102. A side edge of the base plate 1 and an end of the slot 101 away from the insertion port 102 form a limiting portion 103. The connector 2 comprises a mortise and tenon portion 201 cooperating with the slot 101 and a block 202 located above the mortise and tenon portion 201. An avoidance opening 203 is provided between the lower bottom surfaces on both sides of the block 202 and the mortise and tenon portion 201. The mortise and tenon portions 201 at both ends of the connector 2 are respectively inserted into the slots 101 of the two adjacent base plates 1 and the mortise and tenon portions 201 abut against the slots 101. The avoidance opening 203 covers the limiting portion 103.

[0026] In this embodiment, two substrates 1 of the same shape and size and two connecting members 2 of the same size are used. A slot 101 is provided on both sides of the lower bottom surface of the two substrates 1. The two ends of the two mortise and tenon joints 201 are respectively inserted into the slots 101 on both sides of the two substrates 1 to complete the mortise and tenon connection of the two substrates 1. Glue is applied on the bonding surfaces of the two pieces of wood to achieve further reinforcement.

[0027] Specifically, a slot 101 is provided on the bottom plate of the substrate 1, and the slot 101 does not pass through the substrate 1, so that a limiting portion 103 is reserved between the substrate 1 and the connector 2. At the same time, the connector 2 is composed of a tenon 201 and a block 202. The tenon 201 is slidably fitted in the slot 101 of the substrate 1, and the block 202 is integrally formed with the tenon 201 to facilitate pulling out the tenon 201. The length of the tenon 201 is shorter than the length of the block 202. There are avoidance openings 203 between the lower bottom surfaces on both sides of the block 202 and the tenon 201, and the avoidance openings 203 cooperate with the limiting portion 103. When in use, the tenon 201 of the connector 2 is first inserted into the slot 101 of the substrate 1 through the insertion port 102 of one of the substrates 1, and slides inward along the slot 101 until the tenon 2 One end of 01 abuts against the inner wall of the slot 101, limiting the mortise and tenon part 201 from moving forward. At this time, the avoidance opening 203 on one side of the connector 2 covers the limiting part 103 of this substrate 1, and then the other end of the mortise and tenon part 201 enters the slot 101 of the other substrate 1 in the same way, slides inward until it abuts against the inner wall of the slot of this substrate 1, completing the limitation; when both ends of the connector 2 are respectively inserted into the slots 101 of the two substrates 1, the mortise and tenon connection between the substrates 1 is completed. The mortise and tenon structure formed in the above manner hides the mortise and tenon part on the inner side of the substrate, so that the mortise and tenon will not crack or shrink under long-term use, thereby solving the technical problem that the two ends of the connector of the existing mortise and tenon protrude from the substrate, resulting in the mortise and tenon being not beautiful enough.

[0028] like Figure 2-3 As shown: the slot 101 is trapezoidal, and a semicircular inner groove is formed at the end of the slot 101 away from the insertion port 102. When the mortise 201 is mortised in the slot 101, the arc wall of the inner groove and the mortise 201 abut against each other to complete the limiting function. The trapezoidal slot 101 can increase the stability between the substrate 1 and the connector 2, so that the mortise 201 on the connector 2 can only enter the slot 101 through the insertion port 102 on the side of the substrate 1 and cannot escape from the upper opening above the slot 101. In addition, the design of the inner groove with an arc wall can prevent the mortise 201 from directly fitting into the slot 101, so that a certain gap is left between the slot 101 and the mortise 201, thereby limiting the continued movement of the mortise 201 to achieve the limiting function.

[0029] like Figure 1-4As shown: arc-shaped side edges 204 are formed at both ends of the block 202, and the avoidance openings 203 are correspondingly arranged below the arc-shaped side edges 204. The arc-shaped side edges 204 can prevent the edges of the block 202 from being too sharp, thereby avoiding sharp angles that may injure people during the mortise and tenon joint process. At the same time, it can also prevent the human body from being easily injured when colliding with these edges and corners. In addition, the arc-shaped side edges 204 can also increase the aesthetics of the product.

[0030] like Figure 2-4 As shown: the mortise and tenon portion 201 and the block body 202 are integrally formed, and the shape of the mortise and tenon portion 201 is a trapezoid that matches the insertion port 102. The integrally formed design can increase the strength of the connector 2. The block body 202 protrudes from the lower bottom surface of the substrate 1, and its height matches the hand, which is convenient for pulling out the mortise and tenon portion 201. Clamps that match the edges of the slot 101 are formed between the two sides of the trapezoidal mortise and tenon portion 201 and the ground under the block body 202.

[0031] like Figure 2 As shown, there is an upper opening above the slot 101 to facilitate the movement of the connecting member 2. The upper opening facilitates the connecting member 2 to move along the horizontal direction of the slot 101.

[0032] The height of the tenon joint 201 is equal to the depth of the slot 101 . The same depth can make the two fit more closely, thereby increasing the stability and strength of the connection.

[0033] The base plate 1 and the connecting member 2 are made of the same material. In this embodiment, the base plate 1 and the connecting member 2 are both made of wood.

[0034] like Figure 1 As shown, the length of the connecting member 2 is less than or equal to the width of the two substrates 1 after being joined, thereby preventing the connecting member 2 from protruding from both sides of the substrate 1.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A concealed mortise and tenon structure for preventing a plate from cracking or stretching, comprising at least two base plates (1) and a plurality of connecting members (2), characterized in that: The bottom surface of the substrate (1) is provided with a plurality of slots (101), one end of the slot (101) passes through the substrate (1) to form an insertion port (102), a side edge of the substrate (1) and an end of the slot (101) away from the insertion port (102) form a limiting portion (103), the connecting member (2) comprises a tenon portion (201) matched with the slot (101) and a block (202) located above the tenon portion (201), and an avoidance port (203) is provided between the lower bottom surfaces of both sides of the block (202) and the tenon portion (201), the tenon portions (201) at both ends of the connecting member (2) are respectively inserted into the slots (101) of two adjacent substrates (1), and the tenon portions (201) abut against the slots (101), and the avoidance port (203) covers the limiting portion (103).

2. The concealed mortise and tenon structure for preventing cracking or expansion of a plate according to claim 1, characterized in that: The card slot (101) is trapezoidal in shape, and a semicircular inner groove is formed at one end of the card slot (101) away from the insertion port (102). When the mortise and tenon joint (201) is mortised in the card slot (101), the arc wall of the inner groove and the mortise and tenon joint (201) abut to complete the limiting operation.

3. The concealed mortise and tenon structure for preventing the board from cracking or expanding according to claim 2, characterized in that: Arc-shaped side edges (204) are formed at both ends of the block (202), and the avoidance opening (203) is correspondingly arranged below the arc-shaped side edges (204).

4. The concealed mortise and tenon structure for preventing cracking or expansion of a plate according to claim 3, characterized in that: The tenon joint (201) and the block (202) are integrally formed, and the tenon joint (201) is in a trapezoidal shape that matches the insertion opening (102).

5. The concealed mortise and tenon structure for preventing cracking or expansion of a plate according to claim 1, characterized in that: An upper opening is provided above the clamping slot (101) to facilitate the movement of the connecting member (2).

6. The concealed mortise and tenon structure for preventing a plate from cracking or expanding according to claim 1, characterized in that: The height of the tenon joint (201) is equal to the depth of the slot (101).

7. A concealed mortise and tenon structure for preventing a plate from cracking or expanding according to any one of claims 1 to 6, characterized in that: The base plate (1) and the connecting piece (2) are made of the same material.

8. The concealed mortise and tenon joint structure for preventing cracking or expansion of a plate according to claim 7, characterized in that: The length of the connecting member (2) is less than or equal to the width of the two substrates (1) after being joined.

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