Buckling type chair back mounting structure applied to training chair

Abstract

A buckling type chair back mounting structure applied to a training chair comprises a chair seat and a chair back, and the chair seat comprises a back connecting part; a middle supporting part is arranged on the front side of the back connecting part in a protruding mode, and a plurality of middle inserting grooves arranged from left to right are formed in the middle supporting part. A middle matching part is arranged on the back of the chair back in a protruding mode, a plurality of middle inserting parts are arranged at the bottom of the middle matching part in a protruding mode, and the middle inserting parts are inserted into the middle inserting grooves from top to bottom; the left side and the right side of the middle supporting part are each provided with a seat anti-disengaging clamping part in a protruding mode, and the left end and the right end of the middle matching part are each provided with a back anti-disengaging clamping part in a protruding mode, wherein the back anti-disengaging clamping parts are matched with the seat anti-disengaging clamping parts in a buckled mode. According to the utility model, the bolt-free connection between the chair back and the chair seat is realized, the steps of accurate hole alignment operation, bolt screwing and the like are not needed, the installation process is greatly simplified, the installation efficiency is improved, and meanwhile, the purpose of reducing the production cost is achieved due to the omission of fasteners such as bolts and a decorative cover.

Description

Technical Field

[0001] The utility model relates to the technical field of training chairs, in particular to a snap-on chair back mounting structure used on training chairs. Background Art

[0002] The main function of a training chair is to provide people with a comfortable environment so that they can sit for a long time and concentrate on participating in activities during training, learning or meetings. This type of chair is usually used in various places such as schools, universities, training institutions, and conference rooms.

[0003] Referring to the training chair disclosed in the technical solution previously disclosed by the applicant, patent number 202320457401.4, the existing training chair includes a chair frame, a seat and a backrest, wherein the chair is mounted on the chair frame, and the backrest is mounted on the seat. In actual assembly and installation, the connection between the seat and the backrest usually adopts a more typical bolt fixing method. In this design, the backrest is designed with corresponding mounting holes, and the seat extends a back mounting portion on its rear side. The back mounting portion is provided with a through hole corresponding to the backrest mounting hole. During the installation process, the screw end of the bolt passes through the through hole from the rear side of the back mounting portion of the seat and is threadedly connected to the mounting hole of the backrest, thereby achieving a stable connection between the backrest and the seat. In addition, in order to avoid fasteners such as bolts being directly exposed to the outside and affecting the visual effect of the product, this technical solution further provides a decorative cover on the rear side of the back mounting portion of the seat to effectively cover the bolts and reduce visual clutter.

[0004] However, while the above technical solution has achieved certain success in connecting the chair back and seat, it still has certain shortcomings in actual application. For one thing, while the bolt connection method is stable, the installation process is relatively cumbersome, requiring precise hole alignment and screwing in the bolts. Furthermore, while the decorative cover design enhances aesthetics, the additional component increases production costs. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a snap-on chair back mounting structure for a training chair.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A snap-on chair back mounting structure for a training chair comprises a seat and a chair back, wherein the seat comprises a seat body and a back connecting portion integrally formed on the rear end of the seat body; the characteristics are:

[0008] The front upper portion of the back connection portion is provided with a middle support portion, and the middle support portion is provided with a plurality of middle slots arranged from left to right, and the insertion openings of the middle slots are provided through the top of the middle support portion; the back of the chair back is provided with a middle matching portion, and the bottom of the middle matching portion is provided with a plurality of middle inserting portions, and the middle inserting portions are inserted into the middle slots from top to bottom;

[0009] The left and right sides of the middle supporting part are both raised with seat anti-slip clamping parts, and the left and right ends of the middle matching part are both raised with back anti-slip clamping parts that snap-fit ​​with the seat anti-slip clamping parts. The back anti-slip clamping parts and the seat anti-slip clamping parts that snap-fit ​​together form an anti-slip structure that limits the middle inserting part from upwardly detaching from the middle slot.

[0010] In the present invention, the upper front protrusion of the back connecting part is provided with two side support parts respectively close to the left and right ends of the back connecting part, the middle support part is located between the two side support parts, the side support part is provided with a side slot with an insertion port passing through the top of the side support part, the back protrusion of the chair back is provided with a side matching part, each side support part corresponds to a side matching part, and the bottom of the side matching part is provided with a side insertion part for inserting into the side slot from top to bottom.

[0011] In the present invention, the cross-sectional areas of the side slots and the side inserting portions when viewed from above gradually decrease from top to bottom.

[0012] In the present invention, the front slot wall of each of the middle slots is provided with a middle opening which passes through the front side of the middle support portion from back to front and passes through the top of the middle support portion upwards.

[0013] In the present invention, the cross-sectional areas of the middle slot and the middle inserting portion when viewed from above gradually decrease from top to bottom.

[0014] In the present invention, a connection reinforcement convex portion is provided on the top rear side of the back connection portion.

[0015] In the present invention, the back anti-dropout clamping part includes an upper clamping part and a lower clamping part located below the upper clamping part, and an anti-dropout clamping groove for inserting the seat anti-dropout clamping part is formed between the bottom surface of the upper clamping part and the top surface of the lower clamping part.

[0016] In the present invention, the top surface of the lower clamping part is an anti-slip support inclined surface, the front end of the anti-slip support inclined surface is connected to the chair back, and the rear end is inclined backward and downward; the bottom surface of the seat anti-slip clamping part is an anti-slip matching inclined surface for fitting with the anti-slip support inclined surface, and the anti-slip matching inclined surface has the same inclination direction as the anti-slip support inclined surface.

[0017] In the present invention, a deformation guide surface capable of guiding the deformation of the lower clamping part is provided on the outer side of the upper end of the seat anti-slip clamping part, the upper end of the deformation guide surface is close to the side where the seat anti-slip clamping part is connected to the middle support part, and the lower end is extended obliquely and connected to the side surface close to the seat anti-slip clamping part facing away from the middle support part using an arc-shaped guide surface.

[0018] In the present invention, the chair seat and the chair back are both made of injection molding of a material with toughness and elasticity.

[0019] The beneficial effects of the present invention are as follows: the present invention first inserts the middle inserting part into the middle slot and the side inserting part into the side slot, so that the chair back is inserted and installed on the back connecting part of the seat, and then uses the anti-slip structure to limit the middle inserting part from disengaging from the middle slot upward and limit the side inserting part from disengaging from the side slot upward, so that the chair back and the seat are interlocked, ensuring a firm connection between the chair back and the seat, and ensuring their stability and durability after combination, thereby realizing a bolt-free connection between the chair back and the seat, without the need for precise hole alignment operations and screwing in bolts, which greatly simplifies the installation process and improves installation efficiency. At the same time, since the use of fasteners such as bolts and decorative covers is eliminated, the purpose of reducing production costs is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 is a perspective view of this embodiment;

[0022] Figure 2 is a three-dimensional diagram of the chair seat;

[0023] Figure 3 A three-dimensional diagram of the chair back;

[0024] Figure 4 A schematic diagram of the middle plug-in portion being inserted into the middle slot;

[0025] Figure 5 A schematic diagram of the side insert portion being inserted into the side slot;

[0026] Figure 6 Schematic diagram of the seat anti-drop clamping part;

[0027] Figure 7 Schematic diagram of the anti-slip structure. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified 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 ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Reference Figure 1-7 A snap-on chair back mounting structure used on a training chair includes a seat 1 and a chair back 2. The seat 1 and the chair back 2 are both injection-molded from a tough and elastic material. The seat 1 includes a seat body 11 and an integrally formed back connecting portion 12 provided on the rear end of the seat body 11.

[0032] Furthermore, the front upper portion of the back connecting portion 12 is provided with a middle support portion 121 and two side support portions 122 respectively close to the left and right ends of the back connecting portion 12, the middle support portion 121 is located between the two side support portions 122, and the middle support portion 121 is provided with a plurality of middle slots 1211 arranged from left to right, and the insertion openings of the middle slots 1211 are provided through the top of the middle support portion 121; the back of the chair back 2 is provided with a middle matching portion 21, and the bottom of the middle matching portion 21 is provided with a plurality of middle inserting portions 211, each of the middle inserting portions 211 is inserted into one of the middle slots 1211 from top to bottom, so that the middle portion of the chair back 2 and the middle portion of the front side of the back connecting portion 12 are combined together to form an effective support function;

[0033] Furthermore, the side support portion 122 is provided with a side slot 1221 with an insertion port penetrating through the top of the side support portion 122 , and the back bulge of the chair back 2 is provided with a side fitting portion 22 , each side support portion 122 corresponds to a side fitting portion 22 , and the bottom of the side fitting portion 22 is provided with a side inserting portion 221 for inserting into the side slot 1221 from top to bottom. The combination of the side inserting portion 221 and the side slot 1221 can further improve the stability of the combination of the chair back 2 and the seat 1;

[0034] Furthermore, both left and right sides of the middle support portion 121 are protruded with seat anti-slipping portions 123, and both left and right ends of the middle matching portion 21 are protruded with back anti-slipping portions 23 that snap-fit ​​with the seat anti-slipping portions 123. The back anti-slipping portions 23 are integrally formed on the chair back 2, and each back anti-slipping portion 23 corresponds to a seat anti-slipping portion 123. The back anti-slipping portions 23 and the seat anti-slipping portions 123 that snap-fit ​​together form an anti-slipping structure that limits the middle insert 211 from disengaging from the middle slot 1211 upward and limits the side insert 221 from disengaging from the side slot 1221 upward, thereby interlocking the chair back 2 and the seat 1, making it difficult for the chair back 2 to detach from the seat 1, thereby ensuring the quality of the combination between the two.

[0035] In this embodiment, the middle inserting portion 211 is first inserted into the middle slot 1211 and the side inserting portion 221 is inserted into the side slot 1221, so that the chair back 2 is inserted and installed on the back connecting portion 12 of the seat 1, and then the anti-slip structure is used to limit the middle inserting portion 211 from being upwardly disengaged from the middle slot 1211 and to limit the side inserting portion 221 from being upwardly disengaged from the side slot 1221, so that an interlock is formed between the chair back 2 and the seat 1, thereby realizing a bolt-free connection between the chair back 2 and the seat 1.

[0036] As a preferred embodiment, in order to improve the assembly quality between the intermediate slot 1211 and the intermediate inserting portion 211, the front slot wall of each intermediate slot 1211 is provided with a central opening 1212 that penetrates the front side of the intermediate support portion 121 from back to front and penetrates the top of the intermediate support portion 121 upwards. Under the action of the central opening 1212, when the intermediate inserting portion 211 is inserted into the intermediate slot 1211, the intermediate inserting portion 211 can squeeze the portion of the intermediate support portion 121 corresponding to the front slot wall of the intermediate slot 1211 to elastically deform, forming an interference fit, so that the intermediate inserting portion 211 is better clamped in the intermediate slot 1211. In addition, to facilitate the insertion of the intermediate inserting portion 211 into the intermediate slot 1211, the top-view cross-sectional areas of the intermediate slot 1211 and the intermediate inserting portion 211 gradually decrease from top to bottom.

[0037] As a preferred embodiment, in order to facilitate the insertion of the side inserting portion 221 into the side slot 1221 , the top-view cross-sectional areas of the side slot 1221 and the side inserting portion 221 are gradually reduced from top to bottom.

[0038] As a preferred embodiment, a plurality of middle reinforcing ribs 24 are provided on the top of the middle matching portion 21. The front side of the middle reinforcing ribs 24 is integrally connected to the chair back 2, and the bottom is integrally connected to the middle matching portion 21, thereby improving the structural stability therebetween.

[0039] As a preferred embodiment, a plurality of upper reinforcing ribs 25 are provided on the top of the side fitting portion 22. The front side of the upper reinforcing ribs 25 is integrally connected to the chair back 2, and the bottom is integrally connected to the side fitting portion 22, thereby improving the structural stability of the side insertion portion.

[0040] As a preferred embodiment, the top rear side of the back connecting portion 12 is protruded with a connection reinforcement protrusion 124 to enhance the structural stability of the top end of the back connecting portion 12 and provide stable and effective support for the chair back 2.

[0041] As a preferred embodiment, the back anti-slip clamping portion 23 includes an upper clamping portion 231 and a lower clamping portion 232 located below the upper clamping portion 231. An anti-slip clamping slot for inserting the seat anti-slip clamping portion 123 is formed between the bottom surface of the upper clamping portion 231 and the top surface of the lower clamping portion 232, so as to facilitate the cooperation between the seat anti-slip clamping portion 123 and the back anti-slip clamping portion 23. Specifically, the top surface of the lower clamping portion 232 is an anti-slip support inclined surface 2321, the front end of the anti-slip support inclined surface 2321 is connected to the chair back 2, and the rear end is tilted backward and downward; the bottom surface of the seat anti-slip clamping portion 123 is an anti-slip mating inclined surface 1231 for mating with the anti-slip support inclined surface 2321, and the inclination direction of the anti-slip mating inclined surface 1231 and the anti-slip support inclined surface 2321 is the same. Since the side insert 221 and the middle insert 211 are both made of elastic and tough materials, they can be slightly deformed after being inserted, so that the anti-slip mating bevel 1231 fits more closely on the anti-slip support bevel 2321, ensuring the quality of the interlocking of the chair back 2 and the seat 1.

[0042] As a preferred embodiment, a deformation guide surface 1232 is provided on the outer side of the upper end of the seat anti-slip clamping portion 123 to guide the deformation of the lower clamping portion 232. The upper end of the deformation guide surface 1232 is close to the side where the seat anti-slip clamping portion 123 is connected to the middle support portion 121, and the lower end extends obliquely and is connected to the side of the seat anti-slip clamping portion 123 facing away from the middle support portion 121 using an arc-shaped guide surface. During the process of inserting the middle inserting portion 211 into the middle slot 1211, the deformation guide surface 1232 squeezes into the inner side of the lower clamping portion 232, forcing the end of the lower clamping portion 232 away from the chair back 2 to bend and deform in a direction away from the middle matching portion 21 until the side of the seat anti-slip clamping portion 123 facing away from the middle support portion 121 is separated from the lower clamping portion 232. At this time, the lower clamping portion 232 elastically resets, causing the anti-slip matching inclined surface 1231 to press against the anti-slip support inclined surface 2321, thereby improving the efficiency of the seat anti-slip clamping portion 123 and the lower clamping portion 232.

[0043] As a preferred embodiment, armrests are integrally formed on both the left and right sides of the chair back 2 to support the user's hands.

[0044] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the scope of protection of the present invention.

Claims

1. A snap-on chair back mounting structure for a training chair, comprising a chair seat (1) and a chair back (2), wherein the chair seat (1) comprises a seat body (11) and a back connecting portion (12) integrally formed and provided on the rear end of the seat body (11); characterized in that: The front upper portion of the back connecting portion (12) is provided with a middle support portion (121), and the middle support portion (121) is provided with a plurality of middle slots (1211) arranged from left to right, and the insertion openings of the middle slots (1211) are provided through the top of the middle support portion (121); the back of the chair back (2) is provided with a middle matching portion (21) protruding from the back, and a plurality of middle inserting portions (211) are provided on the bottom of the middle matching portion (21), and the middle inserting portions (211) are inserted into the middle slots (1211) from top to bottom; The left and right sides of the middle support portion (121) are both protruded with seat anti-slipping clamping portions (123), and the left and right ends of the middle matching portion (21) are both protruded with back anti-slipping clamping portions (23) that snap-fit ​​with the seat anti-slipping clamping portions (123). The back anti-slipping clamping portions (23) and the seat anti-slipping clamping portions (123) snap-fit ​​together form an anti-slipping structure that restricts the middle inserting portion (211) from upwardly detaching from the middle slot (1211).

2. The buckle-type seat back mounting structure for a training chair according to claim 1, characterized in that: The front upper protrusion of the back connecting portion (12) is provided with two side support portions (122) respectively close to the left and right ends of the back connecting portion (12); the middle support portion (121) is located between the two side support portions (122); the side support portion (122) is provided with a side slot (1221) with an insertion opening penetrating the top of the side support portion (122); the back protrusion of the chair back (2) is provided with a side matching portion (22); each side support portion (122) corresponds to a side matching portion (22); the bottom of the side matching portion (22) is provided with a side insertion portion (221) for inserting into the side slot (1221) from top to bottom.

3. The buckle-type seat back mounting structure for a training chair according to claim 2, characterized in that: The cross-sectional areas of the side slot (1221) and the side inserting portion (221) when viewed from above gradually decrease from top to bottom.

4. The buckle-type seat back mounting structure for a training chair according to claim 1, characterized in that: The front slot wall of each middle slot (1211) is provided with a middle opening (1212) which passes through the front side of the middle support portion (121) from back to front and passes through the top of the middle support portion (121) upwards.

5. The buckle-type seat back mounting structure for a training chair according to claim 1, characterized in that: The cross-sectional areas of the middle slot (1211) and the middle inserting portion (211) when viewed from above gradually decrease from top to bottom.

6. The buckle-type seat back mounting structure for a training chair according to claim 1, characterized in that: The top rear side protrusion of the back connecting portion (12) is provided with a connection reinforcement protrusion (124).

7. The buckle-type seat back mounting structure for a training chair according to claim 1, characterized in that: The back anti-dropout clamping portion (23) comprises an upper clamping portion (231) and a lower clamping portion (232) located below the upper clamping portion (231), and an anti-dropout clamping slot for inserting the seat anti-dropout clamping portion (123) is formed between the bottom surface of the upper clamping portion (231) and the top surface of the lower clamping portion (232).

8. The buckle-type seat back mounting structure for a training chair according to claim 7, characterized in that: The top surface of the lower clamping portion (232) is an anti-slip support inclined surface (2321), the front end of the anti-slip support inclined surface (2321) is connected to the chair back (2), and the rear end is tilted backward and downward; the bottom surface of the seat anti-slip clamping portion (123) is an anti-slip matching inclined surface (1231) for fitting with the anti-slip support inclined surface (2321), and the anti-slip matching inclined surface (1231) and the anti-slip support inclined surface (2321) have the same inclination direction.

9. The buckle-type seat back mounting structure for a training chair according to claim 8, characterized in that: The outer side of the upper end of the seat anti-slipping clamping portion (123) is provided with a deformation guide surface (1232) capable of guiding the deformation of the lower clamping portion (232), the upper end of the deformation guide surface (1232) is close to the side where the seat anti-slipping clamping portion (123) is connected to the middle support portion (121), and the lower end extends obliquely and is connected to a side of the seat anti-slipping clamping portion (123) facing away from the middle support portion (121) using an arc-shaped guide surface.

10. The buckle-type seat back mounting structure for a training chair according to any one of claims 1 to 9, characterized in that: The chair seat (1) and the chair back (2) are both made of injection-molded material having toughness and elasticity.

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