Multipurpose dining chair

The design of this multi-purpose high chair solves the problem of frequent replacement of infant high chairs, adapts to the needs of different age groups, reduces economic burden and resource waste, and ensures safety and comfort.

CN223913810UActive Publication Date: 2026-02-17MU YI (CHONG QING) SHI YE YOU XIAN GONG SI
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Patent Information

Application Number
CN202520169479.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-24
Publication Date
2026-02-17
Estimated Expiration
2035-01-24

AI Technical Summary

Technical Problem

Existing high chairs for infants and toddlers need to be replaced frequently as children grow, increasing the financial burden on families and wasting resources, and they are not suitable for people of different age groups.

Method used

Design a multi-purpose dining chair that allows for height and distance adjustment through the sliding connection between the seat and footrest and the support legs, as well as the cooperation of positioning components. Combined with a detachable ring-shaped partition and dining tray, it can adapt to the usage needs of different age groups.

Benefits of technology

It achieves multi-functionality for dining chairs, is suitable for different age groups, reduces replacement frequency, lowers economic burden, improves resource utilization, and ensures safety and comfort.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of furniture special for children, in particular to a multipurpose dining chair which comprises supporting legs, a seat plate and a pedal, the seat plate and the pedal are arranged in parallel, the seat plate is located above the pedal, and the seat plate and the pedal are both connected with the supporting legs in a sliding mode. Connecting shells are arranged at the bottoms of the seat plate and the pedal, sliding parts are arranged at the two ends of each connecting shell, sliding grooves used in cooperation with the sliding parts are formed in the supporting legs, and a plurality of positioning grooves are formed in the bottoms of the sliding grooves; positioning pieces are arranged among the seat plate, the pedal and the supporting legs and comprise positioning columns arranged on the sliding parts, the positioning columns can move in the length direction of the connecting shell, the moving directions of the two positioning columns are opposite, and the ends, away from the connecting shell, of the positioning columns can stretch into any positioning groove. The scheme is suitable for people of different ages to use.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of children's special furniture, in particular to a multipurpose dining chair. BACKGROUND

[0002] In the growth process of infants, in order to cultivate good eating habits and ensure the safety and comfort when eating, a special dining chair is usually needed. The design of the special dining chair not only meets the physiological characteristics of infants, but also meets the actual needs of parents during feeding, such as having a safety belt to prevent infants from falling. However, infants are in a rapid growth stage, and the changes in height, weight and behavior ability are very rapid, which means that as the child grows, the originally suitable dining chair will soon become unsuitable. Due to the rapidity of the physical development of infants, the replacement frequency of the dining chair is often high, and parents need to replace new dining chairs according to the growth of children to ensure that children can comfortably and safely sit on them to eat, which not only increases the economic burden of the family, but also causes waste in terms of environmental protection and resource utilization. Therefore, there is an urgent need for a dining chair that can be used by people of different age groups. SUMMARY

[0003] The utility model intends to provide a multipurpose dining chair that can be used by people of different age groups.

[0004] The utility model provides the following basic scheme:

[0005] A multipurpose dining chair, comprising support feet, a seat plate and a pedal, the seat plate and the pedal are arranged in parallel, the seat plate is located above the pedal,

[0006] The seat plate and the pedal are both in sliding connection with the support feet; the bottom of the seat plate and the pedal is provided with a connecting shell, both ends of the connecting shell are provided with a sliding part, a sliding groove matched with the sliding part is formed on the support feet, and a plurality of positioning grooves are formed in the bottom of the sliding groove;

[0007] A positioning member is arranged between the seat plate, the pedal and the support feet, the positioning member comprises a positioning column arranged on the sliding part, the positioning column can move along the length direction of the connecting shell, the moving directions of the two positioning columns are opposite, and one end of the positioning column away from the connecting shell can extend into any positioning groove.

[0008] Further, the positioning member further comprises a positioning reset spring, a limiting groove is formed on the sliding part, the positioning column is in sliding connection with the limiting groove, and the positioning reset spring is arranged between the positioning column and the limiting groove.

[0009] Further, the connecting shell is further provided with a trigger block, two moving blocks and two pull ropes, one end of the trigger block is provided with two guide parts, and the opposite sides of the guide parts are both provided with guide inclined surfaces.

[0010] The two moving blocks are provided with moving reset springs parallel to the length direction of the connecting shell, and the opposite sides of the two moving blocks are provided with moving slopes, the guide slopes abut against the moving slopes one by one.

[0011] The trigger block and the moving block are in sliding connection with the connecting shell, the sliding direction of the moving block is parallel to the length direction of the connecting shell, the moving directions of the two moving blocks are opposite, and the sliding direction of the trigger block is perpendicular to the sliding direction of the moving block.

[0012] The two ends of the pull rope are connected with the moving blocks and the positioning columns respectively.

[0013] Further, the distance between the two guide slopes gradually decreases in the direction from the moving block to the trigger block.

[0014] Further, the connecting shell is further provided with a trigger reset spring, one end of the trigger reset spring abuts against the end of the trigger block facing the moving block, the other end of the trigger reset spring abuts against the connecting shell, and the trigger reset spring is perpendicular to the length direction of the connecting shell.

[0015] Further, the bottom of the trigger block is provided with a handle, the free end of the handle can extend out of the bottom of the connecting shell, and the bottom of the connecting shell is provided with a trigger groove for the movement of the handle.

[0016] Further, the top of the supporting leg is provided with a waist support plate.

[0017] Further, the application further comprises a ring-shaped fence, the ring-shaped fence abuts against the waist support plate, the ring-shaped fence is located above the seat plate, the bottom of the side of the ring-shaped fence away from the waist support plate is provided with a gap, and the bottom of the side of the ring-shaped fence away from the waist support plate is provided with a baffle.

[0018] Further, the application further comprises a dinner plate in detachable connection with the top of the supporting leg, and the edge of the dinner plate is provided with an anti-overflow protrusion.

[0019] Further, the bottom of each end of the dinner plate is provided with a clamping piece, and the top of the supporting leg is provided with a clamping groove for the extension of the clamping piece.

[0020] The beneficial effects of the basic scheme are as follows:

[0021] The supporting leg is provided to support the whole dining chair, the seat plate is for the user to sit on, and the pedal is for the user to put his feet on. The connecting shell is provided so that the seat plate and the pedal can be stably installed on the supporting leg, and through the cooperation of the sliding part and the sliding groove, the seat plate and the pedal can move along the supporting leg. Meanwhile, through the cooperation of the positioning column and the positioning groove, the seat plate and the pedal can be fixed at the position after being moved to the required position. In this way, by adjusting the height of the seat plate and the pedal and the distance between them, the dining chair can be used by people of different age groups. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Figure 1 is a structural schematic diagram of a multipurpose dining chair according to an embodiment of the present application;

[0023] Figure 2 Figure 2 is a top view of the multipurpose dining chair according to the embodiment of the present application;

[0024] Figure 3 Figure 3 is a structural schematic diagram of the footboard of the multipurpose dining chair according to the embodiment of the present application from another perspective;

[0025] Figure 4 Figure 4 is a structural schematic diagram of the connecting shell of the multipurpose dining chair according to the embodiment of the present application after the seat board is removed;

[0026] Figure 5 Figure 5 is a structural schematic diagram of a multipurpose dining chair according to another embodiment of the present application;

[0027] Figure 6 Figure 6 is a structural schematic diagram of the annular enclosure of the multipurpose dining chair according to the embodiment of the present application;

[0028] Figure 7 Figure 7 is a structural schematic diagram of a multipurpose dining chair according to another embodiment of the present application;

[0029] Figure 8 Figure 8 is a structural schematic diagram of the dining plate of the multipurpose dining chair according to the embodiment of the present application. DETAILED DESCRIPTION

[0030] The embodiments will be further described in detail below:

[0031] The reference signs in the drawings of the specification include: seat board 1, footboard 2, first U-shaped rod 3, second U-shaped rod 4, waist support plate 5, sliding groove 6, connecting shell 7, sliding part 8, positioning column 9, positioning reset spring 10, trigger block 11, moving block 12, pull rope 13, moving reset spring 14, trigger reset spring 15, handle 16, U-shaped support 17, annular enclosure 18, baffle 19, dining plate 20, anti-overflow protrusion 21, round knob 22, wedge block 23.

[0032] Embodiment 1

[0033] A multipurpose dining chair, as shown in the accompanying drawings of the embodiments of the present application, Figure 1As shown, the support leg comprises a first U-shaped rod 3 and a second U-shaped rod 4, the free ends of the first U-shaped rod 3 and the second U-shaped rod 4 are both downward, and the top of the first U-shaped rod 3 and the second U-shaped rod 4 is curved, that is, one end of the first U-shaped rod 3 and the second U-shaped rod 4 away from the free end is curved. The two ends of the first U-shaped rod 3 pass through the top of the second U-shaped rod 4 respectively, and are fixedly connected. The top of the support leg is provided with a waist support plate 5, specifically, the waist support plate 5 is an arc-shaped plate, the top of the waist support plate 5 is fixedly connected with the top of the first U-shaped rod 3, and the bottom of the waist support plate 5 is fixedly connected with the second U-shaped rod 4. The free ends of the first U-shaped rod 3 and the second U-shaped rod 4 are both provided with a connecting rod, one end of the connecting rod is fixedly connected with the two free ends of the first U-shaped rod 3 respectively, and the other end of the connecting rod is fixedly connected with the two free ends of the second U-shaped rod 4 respectively. In this embodiment, the first U-shaped rod 3 and the second U-shaped rod 4 are welded, the waist support plate 5 is welded with the first U-shaped rod 3 and the second U-shaped rod 4 respectively, and the connecting rod is welded with the first U-shaped rod 3 and the second U-shaped rod 4 respectively.

[0034] As shown in the accompanying drawings, Figure 2 As shown, the seat plate 1 and the pedal plate 2 are arranged in parallel, the seat plate 1 is above the pedal plate 2, and the seat plate 1 and the pedal plate 2 are both in sliding connection with the support leg. The bottom of the seat plate 1 and the pedal plate 2 is provided with a connecting shell 7, the two ends of the connecting shell 7 are provided with a sliding part 8, the support leg is provided with a sliding groove 6 matched with the sliding part 8, and the bottom of the sliding groove 6 is provided with a plurality of positioning grooves. Specifically, the seat plate 1 and the pedal plate 2 are both in sliding connection with the second U-shaped rod 4, the sliding groove 6 is arranged on the opposite side of the second U-shaped rod 4, and the sliding groove 6 is a strip-shaped groove arranged along the length direction of the second U-shaped rod 4. The positioning grooves are arranged on the bottom of the sliding groove 6 and are evenly distributed along the length direction of the sliding groove 6. The sliding part 8 is located in the sliding groove 6 and can move along the length direction of the sliding groove 6, and the cross section of the sliding groove 6 and the sliding part 8 is T-shaped. With this design, the sliding part 8 can slide in the sliding groove 6 and cannot be taken out of the sliding groove 6. In this embodiment, the connecting shell 7 is fixedly connected with the seat plate 1 and the pedal plate 2 by means of flat head screws.

[0035] The positioning member is provided between the seat plate 1, the pedal 2 and the supporting leg, and comprises a positioning column 9 provided on the sliding part 8. The positioning column 9 is movable along the length direction of the connecting shell 7, and the moving directions of the two positioning columns 9 are opposite. The end of the positioning column 9 away from the connecting shell 7 can extend into any positioning groove. Specifically, the length direction of the connecting shell 7 is perpendicular to the length direction of the second U-shaped rod 4. The positioning member further comprises a positioning reset spring 10. The sliding part 8 is provided with a limiting groove. The positioning column 9 is in sliding connection with the limiting groove. The positioning reset spring 10 is provided between the positioning column 9 and the limiting groove. In the embodiment, the two ends of the side wall of the positioning column 9 extend to form limiting parts. The top of the side wall of the positioning column 9 extends to form a mounting part. The longitudinal section of the positioning column 9 at the limiting part and the mounting part is the same as the longitudinal section of the limiting groove. The limiting groove is used in cooperation with the positioning column 9. The positioning reset spring 10 is located between the bottom of the mounting part and the limiting groove. The extension direction of the positioning reset spring 10 is parallel to the moving direction of the positioning column 9.

[0036] In the initial state, the positioning reset spring 10 is in a free extension state. At this time, the end of the positioning column 9 away from the sliding part 8 extends out of the limiting groove and abuts against the groove bottom of any positioning groove. When it is necessary to adjust the position, the positioning column 9 is forced to move towards the sliding part 8 and compress the positioning reset spring 10. At this time, the end of the positioning column 9 away from the sliding part 8 can abut against the groove bottom of the sliding groove 6. When the positioning column 9 is moved to the specified position, the positioning reset spring 10 is reset. At this time, the positioning column 9 extends out again and abuts against the groove bottom of the positioning groove at the specified position.

[0037] The connecting shell 7 is further provided with a trigger block 11, two moving blocks 12 and two pull ropes 13. The trigger block 11 and the moving block 12 are in sliding connection with the connecting shell 7. The sliding direction of the moving block 12 is parallel to the length direction of the connecting shell 7. The moving directions of the two moving blocks 12 are opposite. The sliding direction of the trigger block 11 is perpendicular to the sliding direction of the moving block 12.

[0038] One end of the trigger block 11 is provided with two guide portions, and the opposite sides of the guide portions are respectively provided with guide inclined surfaces. A moving reset spring 14 is arranged between the two moving blocks 12, and the extension direction of the moving reset spring 14 is parallel to the length direction of the connecting shell 7. The opposite sides of the two moving blocks 12 are respectively provided with moving inclined surfaces, the guide inclined surfaces and the moving inclined surfaces are opposite and correspond to each other. In the direction from the moving block 12 to the trigger block 11, the distance between the two guide inclined surfaces gradually decreases. In order to facilitate the movement of the moving block 12, a guide protrusion is further arranged in the connecting shell 7, the length direction of the guide protrusion is parallel to the length direction of the connecting shell 7, and the bottom of the moving block 12 is provided with a guide through slot matched with the guide protrusion. In this way, the sliding block can stably move along the length direction of the guide protrusion. In this embodiment, the trigger block 11, the guide portion and the guide inclined surface are integrally formed, the moving block 12 and the moving inclined surface are integrally formed, and the guide protrusion and the connecting shell 7 are integrally formed. When the trigger block 11 moves towards the moving block 12, the two moving blocks 12 move relative to each other under the restriction of the guide inclined surfaces and the moving inclined surfaces, that is, the distance between the two moving blocks 12 decreases, and at this time, the moving reset spring 14 is compressed. After the trigger block 11 is reset, the moving reset spring 14 is reset, and at this time, the two moving blocks 12 move away from each other, that is, the distance between the two moving blocks 12 gradually increases and resets.

[0039] The connecting shell 7 is further provided with a trigger reset spring 15, one end of the trigger reset spring 15 is opposite to the end of the trigger block 11 towards the moving block 12, the other end of the trigger reset spring 15 is opposite to the connecting shell 7, and the extension direction of the trigger reset spring 15 is perpendicular to the length direction of the connecting shell 7. When the trigger block 11 moves towards the moving block 12 under the action of the force, the trigger reset spring 15 is compressed, and when the force is removed, the trigger reset spring 15 is reset to reset the trigger block 11.

[0040] The two ends of the pull rope 13 are respectively connected with the moving blocks 12 and the positioning columns 9. Specifically, one end of the pull rope 13 is connected with the end of the moving block 12 away from the other moving block 12, and the other end is connected with the end of the positioning column 9 away from the positioning groove. When the moving blocks 12 move relative to each other, the two positioning columns 9 move towards the connecting shell 7 (the moving directions of the two positioning columns 9 are opposite), at this time, the position can be adjusted, and when the moving blocks 12 move away from each other, the two positioning columns 9 move towards the corresponding sliding grooves 6, at this time, the position can be fixed. In this embodiment, the connecting shell 7 is provided with a cavity, and the trigger block 11, the two moving blocks 12, the two pull ropes 13, the moving reset spring 14 and the trigger reset spring 15 are located in the cavity. The cavity is communicated with the limiting groove, and the pull rope 13 passes through the cavity and the limiting groove.

[0041] As shown in FIG. 1, the sliding groove 6 is provided with a limiting groove 8, and the limiting groove 8 is arranged at the end of the sliding groove 6 away from the connecting shell 7. The limiting groove 8 is matched with the pull rope 13, and the pull rope 13 is arranged in the limiting groove 8. The limiting groove 8 is provided with a positioning groove, and the positioning column 9 is arranged in the positioning groove. The positioning column 9 is matched with the pull rope 13, and the pull rope 13 is arranged in the positioning groove. Figure 3As shown, the bottom of the trigger block 11 is provided with a handle 16, the free end of the handle 16 can extend out of the bottom of the connecting shell 7, the bottom of the connecting shell 7 is provided with a trigger slot for the movement of the handle 16. In this embodiment, the trigger slot communicates with the chamber, the handle 16 is integrally formed with the trigger block 11.

[0042] As shown in the accompanying drawings, Figure 4 In this embodiment, the area of the seat plate 1 is larger than that of the step plate 2, the connecting shell 7 connected with the seat plate 1 is provided with a U-shaped bracket 17 located in the chamber, and a flat head screw is fixedly connected with the seat plate 1 through the U-shaped bracket 17. The spring is a very mature basic component in the prior art, and its connection is also a prior art, so the specific connection structure of the positioning return spring 10, the moving return spring 14 and the trigger return spring 15 will not be described here.

[0043] In use, one end of the positioning column 9 is located in the positioning groove, at this time the positions of the seat plate 1 and the step plate 2 are fixed. Taking the step plate 2 as an example, when it is necessary to adjust the position, the handle 16 at the bottom of the step plate 2 is held and moved, so that the trigger block 11 moves towards the moving block 12 (at this time the trigger return spring 15 is compressed), under the guidance of the guide inclined surface and the moving inclined surface and the restriction of the guide protrusions, the two moving blocks 12 move relative to each other (at this time the moving return spring 14 is compressed), the positioning column 9 moves relative to the step plate 2 through the pull rope 13 (at this time the positioning return spring 10 is compressed), at this time the positioning column 9 is out of the positioning groove. Move the step plate 2 along the length direction of the sliding groove 6 to any position where the positioning groove is located, at this time the handle 16 is released, under the action of the trigger return spring 15, the trigger block 11 returns, under the action of the moving return spring 14, the two moving blocks 12 move away from each other, and under the action of the positioning return spring 10, the two positioning columns 9 return, at this time one end of the positioning column 9 extends into the positioning groove, and the position of the step plate 2 is fixed again.

[0044] Embodiment two

[0045] The difference between this embodiment and embodiment one is that:

[0046] A multipurpose dining chair, as shown in the accompanying drawings, Figure 5 , 6 As shown, it also includes a ring-shaped enclosure 18, the ring-shaped enclosure 18 abuts against the waist guard plate 5, the ring-shaped enclosure 18 is located above the seat plate 1, and the ring-shaped enclosure 18 and the waist guard plate 5 are detachably connected through the existing buckle. The setting of the ring-shaped enclosure 18 limits the activities of younger infants, so that parents can better feed the children.

[0047] The circular barrier 18 has a notch at its bottom on the side away from the lumbar support 5, and a baffle 19 at its bottom on the same side. The baffle 19 divides the notch into two sections. In this embodiment, the circular barrier 18 and the baffle 19 are integrally formed. The notch allows the infant's legs to extend, while the baffle 19 restricts the infant's position to prevent them from slipping.

[0048] In this solution, the ring-shaped barrier 18 and the baffle 19 effectively prevent infants from slipping off the high chair while being fed, thus ensuring their safety. They also secure the infant, providing a safe dining environment and making it easier for parents to care for them.

[0049] Example 3

[0050] The difference between this embodiment and the above embodiments is that:

[0051] A multi-purpose dining chair, as shown in the attached image. Figure 7 , 8 As shown, the device also includes a plate 20 detachably connected to the top of the support leg, and the edge of the plate 20 is provided with an anti-overflow protrusion 21. In this embodiment, the anti-overflow protrusion 21 and the plate 20 are integrally formed. The anti-overflow protrusion 21 can prevent food and soup from dripping during infants' eating, making it easier to clean up food residue.

[0052] The bottom of both ends of the plate 20 is provided with snap-fit ​​components, and the top of the support leg is provided with snap-fit ​​grooves into which the snap-fit ​​components extend. Specifically, the groove wall of the snap-fit ​​groove is provided with a blocking groove and a guide groove, which are located on opposite sides of the snap-fit ​​groove. The snap-fit ​​component includes a snap-fit ​​block and snap-fit ​​portions located at the bottom of both ends of the plate 20. The cross-sectional area of ​​the snap-fit ​​portion is smaller than the cross-sectional area of ​​both ends of the plate 20. The snap-fit ​​portion and the snap-fit ​​groove are shaped to match, and the snap-fit ​​portion can extend into the snap-fit ​​groove. One side of the snap-fit ​​portion is provided with a snap-fit ​​protrusion, which cooperates with the guide groove and can extend into the guide groove. In this embodiment, the snap-fit ​​portion, the snap-fit ​​protrusion and the plate 20 are integrally formed.

[0053] The snap-fit ​​block includes a round button 22, with a connecting portion extending from the bottom of one end of the round button 22. A wedge-shaped block 23 is provided at the end of the connecting portion away from the round button 22, and the wedge-shaped block 23 can be snapped into a locking groove. The bottom of both ends of the plate 20 has holes for the round button 22, and the snap-fit ​​portion has snap-fit ​​holes, with the round button 22 holes communicating with the snap-fit ​​holes. The round button 22 is located within the round button 22 holes, the connecting portion is located within the snap-fit ​​holes, and the wedge-shaped block 23 extends from the snap-fit ​​holes. In this embodiment, the round button 22, the connecting portion, and the wedge-shaped block 23 are integrally formed.

[0054] In use, the clamping block is inserted into the clamping groove, the wedge-shaped block 23 is blocked by the blocking groove, so that the dinner plate 20 is fixed. When the dinner plate 20 is removed, the knob 22 is pressed, the knob 22 drives the wedge-shaped block 23 to move, the wedge-shaped block 23 is retracted, and at this time the clamping block can be pulled out of the clamping groove. In order to facilitate use, a clamping spring is arranged between the knob 22 and the knob 22 hole, when the knob 22 is pressed, the clamping spring is compressed, and after stopping pressing the knob 22, the clamping spring resets.

[0055] In the scheme, through the detachable setting of the dinner plate 20, the baby can try to eat, which helps the baby to gradually master the ability of independent eating.

[0056] The above is only an embodiment of the present application, and the common knowledge of the specific structure and characteristics in the scheme is not described in detail, the ordinary skilled in the art knows all the ordinary technical knowledge in the technical field of the present application before the application date or the priority date, can know all the prior art in the field and has the ability to apply the conventional experimental means before the date, the ordinary skilled in the art can improve and implement the present scheme under the inspiration of the present application, some typical known structures or known methods should not be an obstacle for the ordinary skilled in the art to implement the present application. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A multipurpose dining chair, comprising a supporting leg, a seat plate and a step plate, the seat plate and the step plate being arranged in parallel, the seat plate being above the step plate, characterized in that: the seat plate and the step plate are in sliding connection with the supporting leg; the bottom of the seat plate and the step plate is provided with a connecting shell, the two ends of the connecting shell are provided with sliding parts, the supporting leg is provided with sliding grooves matched with the sliding parts, and the bottom of the sliding grooves is provided with a plurality of positioning grooves; a positioning member is arranged between the seat plate, the step plate and the supporting leg, the positioning member comprises a positioning column arranged on the sliding part, the positioning column can move along the length direction of the connecting shell, the moving directions of the two positioning columns are opposite, and the end of the positioning column away from the connecting shell can extend into any positioning groove. The positioning member further comprises a positioning reset spring, a limiting groove is arranged on the sliding part, the positioning column is in sliding connection with the limiting groove, and the positioning reset spring is arranged between the positioning column and the limiting groove.

2. A multi-purpose dining chair according to claim 1, characterized in that: The connecting shell is further provided with a trigger block, two moving blocks and two pull ropes, one end of the trigger block is provided with two guide parts, and the opposite sides of the guide parts are both provided with guide inclined surfaces; 3. A multi-purpose dining chair according to claim 2, characterized in that: a moving reset spring is arranged between the two moving blocks, the moving reset spring is parallel to the length direction of the connecting shell, the opposite sides of the two moving blocks are both provided with moving inclined surfaces, the guide inclined surfaces and the moving inclined surfaces are opposite and one-to-one corresponding; the trigger block and the moving block are in sliding connection with the connecting shell, the sliding direction of the moving block is parallel to the length direction of the connecting shell, the moving directions of the two moving blocks are opposite, and the sliding direction of the trigger block is perpendicular to the sliding direction of the moving block; the two ends of the pull rope are connected with the moving block and the positioning column respectively. The distance between the two guide inclined surfaces gradually decreases in the direction from the moving block to the trigger block.

4. A multi-purpose dining chair according to claim 3, characterized in that: The connecting shell is further provided with a trigger reset spring, one end of the trigger reset spring is opposite to the end of the trigger block facing the moving block, the other end of the trigger reset spring is opposite to the connecting shell, and the trigger reset spring is perpendicular to the length direction of the connecting shell.

5. A multi-purpose dining chair according to claim 4, characterized in that: The bottom of the trigger block is provided with a handle, the free end of the handle can extend out of the bottom of the connecting shell, and the bottom of the connecting shell is provided with a trigger groove for the movement of the handle.

6. A multi-purpose dining chair according to claim 5, characterized in that: The top of the supporting leg is provided with a waist support plate.

7. A multi-purpose dining chair according to claim 6, characterized in that: Further comprising a ring-shaped fence, the ring-shaped fence is opposite to the waist support plate, the ring-shaped fence is above the seat plate, the bottom of the side of the ring-shaped fence away from the waist support plate is provided with a gap, and the bottom of the side of the ring-shaped fence away from the waist support plate is provided with a baffle.

8. A multi-purpose chair according to claim 5 or 6 or 7, characterized in that: Further comprising a dining plate in detachable connection with the top of the supporting leg, the edge of the dining plate is provided with an anti-overflow protrusion.

9. A multi-purpose chair according to any one of claims 6 to 8, wherein: The bottom of the two ends of the dining plate is provided with a clamping member, and the top of the supporting leg is provided with a clamping groove for the extension of the clamping member.

10. A multi-purpose dining chair according to claim 9, characterized in that: ​