CN219249639U

CN219249639U - Mounting structure between chair backrest and armrests

Info

Publication number: CN219249639U
Application number: CN202223401677.5U
Authority: CN
Inventors: 何炯文; 陈建明; 黄龙飞; 陈锐
Original assignee: Foshan Nanhai Shangshi Household Products Co ltd
Current assignee: Foshan Nanhai Shangshi Household Products Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-06-27
Anticipated expiration: 2032-12-19

Abstract

An installation structure between a chair backrest and armrests, which is characterized in that: the back rest comprises a tenon groove arranged on the back of the back rest and a tenon arranged on the rear end of the handrail, and the handrail is buckled into the tenon groove through the tenon and is connected with the tenon groove; the locking device is arranged between the tenon and the mortise, the tenon and the mortise are fixed into a whole, and the connection between the backboard and the handrail is realized. The beneficial effects of the utility model are as follows: adopt mortise-tenon joint for main connecting force between handrail and the back board all is born by this mortise-tenon joint, and need not mainly to rely on connecting bolt, for this kind of plane fixed mode of single bolted connection fixed, this kind of mortise-tenon joint structure is outstanding that it has the advantage of three-dimensional fastening, just needs a screw or locating pin etc. can fix dead furniture junction moreover, and installation or dismouting are more convenient and required time is short.

Description

Mounting structure between chair backrest and armrests

Technical Field

The utility model relates to outdoor furniture, in particular to a mounting structure between a chair backrest and armrests.

Background

Along with improvement of life quality, comfort requirements of people on living environment are improved, daily leisure points are arranged in balconies or small gardens in a plurality of families, and tables and chairs also become necessary furniture for the leisure points, such as outdoor metal chairs (including iron or cast aluminum outdoor chairs) are more liked by modern people, but due to one of characteristics of outdoor metals: the weight is heavy (compared with plastic or wooden furniture, the weight difference is particularly obvious compared with the plastic or wooden furniture), and great manpower and material resources are required to be consumed during transportation and carrying (particularly, the transportation cost is higher when the furniture is sold to other provinces or abroad, and the furniture is not beneficial to manufacturers, so that a plurality of manufacturers push out furniture with parts capable of being detached and installed (such as the separation between a backrest and an armrest of a chair) through screw fixation (namely, through the separation between the parts of the chair such as the backrest and the armrest by using screw fixation), and a plurality of screw fixation are required to be arranged at each connecting part in order to ensure firm connection of the parts of the chair, but the screw fixation structure has the following defects: 1. the number of the screws is large, and the production cost is increased; 2. the number of the screws is large, and the time required for mounting or dismounting is relatively longer, so that the screws are not beneficial to consumers; 3. the screw fixing structure can only solve the problem of stress in a single direction, is a plane fixing structure, is applied to furniture, and has only one stress position, so that the stress difference is more obvious, and further improvement is needed.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the mounting structure between the backrest and the armrest of the chair, which has the advantages of simple structure, convenient installation or disassembly and fastening connection relation among all parts.

The utility model aims at realizing the following modes: an installation structure between a chair backrest and armrests, which is characterized in that: the back rest comprises a tenon groove arranged on the back of the back rest and a tenon arranged on the rear end of the handrail, and the handrail is buckled into the tenon groove through the tenon and is connected with the tenon groove; the locking device is arranged between the tenon and the mortise, the tenon and the mortise are fixed into a whole, and the connection between the backboard and the handrail is realized.

The locking device is a mounting hole arranged on the tenon and a screw-connection hole arranged in the tenon groove, and a fixing screw penetrates through the mounting hole and is in screw-connection with the screw-connection hole to fix the tenon in the tenon groove.

The mounting holes are stepped holes, and the fixing screws are countersunk screws which are arranged in the stepped holes.

The locking device is a mounting hole arranged on the tenon and an anti-drop hole arranged in the mortise, and the expansion pin penetrates through the mounting hole and then is in buckle connection with the anti-drop hole.

The expansion pin comprises a connecting shaft and a limiting table arranged at one end of the connecting shaft, wherein the other end of the connecting shaft is provided with a conical guide table with a small front and a large rear, the diameter of the large diameter end of the conical guide table is larger than that of the connecting shaft, the end face of the conical guide table is provided with a deformation groove extending along the axis direction, and the deformation groove penetrates through the cylindrical surface of the connecting shaft.

The deformation groove is a straight groove.

The deformation grooves are arranged in a cross groove.

The locking device is a first pin hole arranged on the side wall of the tenon and a second pin hole arranged on the side wall of the mortise, after the tenon is installed with the mortise, the first pin hole is communicated with the second pin hole, and the locating pin penetrates through the second pin hole and then penetrates into the first pin hole, so that the tenon and the mortise are fixed into a whole.

The locating pin is in a conical rod shape.

The tenon groove is arranged in a trapezoid groove shape, and correspondingly, the tenon head is arranged in a trapezoid block shape.

The beneficial effects of the utility model are as follows: 1. simple structure, low production cost and market competitiveness improvement. 2. Adopt mortise-tenon joint for main connecting force between handrail and the back board all is born by this mortise-tenon joint, and need not mainly to rely on connecting bolt, for this kind of plane fixed mode of single bolted connection fixed, this kind of mortise-tenon joint structure is outstanding that it has the advantage of three-dimensional fastening, just needs a screw or locating pin etc. can fix dead furniture junction moreover, and installation or dismouting are more convenient and required time is short. 3. And a locking device is further arranged between the mortise and tenon structures, so that the firmness of mortise and tenon connection is further improved.

Drawings

Fig. 1 and 2 are diagrams showing the overall assembly effect of the present utility model.

Fig. 3 is an enlarged view of the structure of the portion a of fig. 2 in the present utility model.

Fig. 4 is an assembled view of the armrest and backrest according to the present utility model.

Fig. 5 is an enlarged view of the B part structure of fig. 4 in the present utility model.

Fig. 6 is a schematic structural view of a first embodiment of a locking device according to the present utility model.

Fig. 7 is a schematic structural view of a second embodiment of a locking device in the present utility model.

Fig. 8 is a schematic view of the expansion pin structure according to the present utility model.

Fig. 9 is a cross-sectional view of an expansion pin structure according to the present utility model.

Fig. 10 is a schematic structural view of a third embodiment of a locking device in the present utility model.

Detailed Description

The utility model is described in more detail below with reference to the accompanying drawings. An installation structure between a chair backrest and armrests, which is characterized in that: the back rest comprises a tenon groove 2 arranged on the back of the back rest plate 1 and a tenon 4 arranged on the rear end of the handrail 3, wherein the handrail 3 is buckled into the tenon groove 2 through the tenon 4 to be connected with the tenon groove 2; the locking device is arranged between the tenon 4 and the mortise 2, the tenon 4 and the mortise 2 are fixed into a whole, and the connection between the backboard 1 and the handrail 3 is realized.

The locking device is provided with a mounting hole 5 arranged on the tenon 4 and a screw-connection hole 6 arranged in the tenon groove 2, and a fixing screw 7 passes through the mounting hole 5 and is in screw-connection with the screw-connection hole 6 to fix the tenon 4 in the tenon groove 2.

The mounting hole 5 is a step hole, and the fixing screw 7 is a countersunk screw which is arranged in the step hole.

The locking device is provided with a mounting hole 5 arranged on the tenon 4 and an anti-falling hole 8 arranged in the mortise 2, and an expansion pin 9 passes through the mounting hole 5 and is in buckling connection with the anti-falling hole 8.

The expansion pin 9 comprises a connecting shaft 91 and a limiting table 92 arranged at one end of the connecting shaft 91, wherein a conical guide table 93 with a small front and a large rear is arranged at the other end of the connecting shaft 91, the diameter of the large diameter end of the conical guide table 93 is larger than that of the connecting shaft 91, a deformation groove 94 extending along the axial direction is formed in the end face of the conical guide table 93, and the deformation groove 94 penetrates through the cylindrical surface of the connecting shaft 91.

The deformation groove 94 is a straight groove.

The deformation grooves 94 are cross grooves.

The locking device is a first pin hole 10 arranged on the side wall of the tenon 4 and a second pin hole 11 arranged on the side wall of the mortise 2, after the tenon 4 is installed with the mortise 2, the first pin hole 10 is communicated with the second pin hole 11, and a positioning pin 12 penetrates through the second pin hole 11 and then is inserted into the first pin hole 10, so that the tenon 4 and the mortise 2 are fixed into a whole.

The positioning pin 12 is arranged in a conical rod shape.

The tenon groove 2 is arranged in a trapezoid groove shape, and correspondingly, the tenon 4 is arranged in a trapezoid block shape.

Working principle: in the scheme, the armrests of the chair are connected with the backboard through a mortise and tenon structure, specifically, the mortise 2 on the backboard 1, the tenon 4 on the armrests 3 are buckled into the mortise 2 through the tenon 4, a locking device is arranged between the tenon 4 and the mortise 2, and the tenon 4 and the mortise 2 are fixed into a whole. After the tenon is connected with the mortise, the left-right, up-down and forward degrees of freedom between the tenon and the mortise can be limited by the mortise structure, and the locking device only needs to limit the tenon to be separated from the mortise, namely, limit the backward degrees of freedom. Therefore, the stress requirement on the locking device is smaller.

Fig. 6 is a schematic structural diagram of a first embodiment of the locking device in this case. The locking device is provided with a mounting hole 5 arranged on the tenon 4 and a screw-connection hole 6 arranged in the tenon groove 2, and a fixing screw 7 passes through the mounting hole 5 and is in screw-connection with the screw-connection hole 6 to fix the tenon 4 in the tenon groove 2. Wherein, for better hidden set screw for the chair appearance is clean and tidy more pleasing to the eye, and mounting hole 5 in this case is the step hole, and set screw 7 is countersunk head screw installation in this step hole. The nut portion of the set screw is hidden by the depth of the stepped hole. Wherein, the internal thread is processed in the screw joint hole by processing modes such as tapping, and the fixing screw 7 is screwed with the internal thread. The mortise-tenon connection structure is adopted between the chair back and the armrests, so that the mortise-tenon connection structure is hidden, and the stress performance requirement on the direction of the fixing screw is not high, and the phenomena of screw hole damage and the like are avoided.

Fig. 7 is a schematic structural diagram of a second embodiment of the locking device in this case. The locking device is provided with a mounting hole 5 arranged on the tenon 4 and an anti-falling hole 8 arranged in the mortise 2, and an expansion pin 9 passes through the mounting hole 5 and is in buckling connection with the anti-falling hole 8. One end of the expansion pin 9 is provided with a conical guide table 93 with a small front and a large rear. When the user installs the expansion pin, utilize toper guide table 93 and mounting hole to extrude the back each other for toper guide table 93 is inwards crooked deformation under the effect of deformation groove 94, finally passes the mounting hole after, toper guide table 93 resets the buckle and fixes on the back of mounting hole. Wherein, form the back-off between toper guide table 93 and the connecting axle 91, so expansion pin generally can not dismantle after the installation to avoided the chair in the use, lead to the adapting unit pine to take off because of the screw looseness, guaranteed the stability of this chair later stage use.

Fig. 10 is a schematic structural view of a third embodiment of the locking device in this case. The locking device is a first pin hole 10 arranged on the side wall of the tenon 4 and a second pin hole 11 arranged on the side wall of the mortise 2, after the tenon 4 is installed with the mortise 2, the first pin hole 10 is communicated with the second pin hole 11, and a positioning pin 12 penetrates through the second pin hole 11 and then is inserted into the first pin hole 10, so that the tenon 4 and the mortise 2 are fixed into a whole. The positioning pin 12 is arranged in a tapered rod shape. After the locating pin is inserted into the first pin hole 10, the second pin hole 11 is in interference fit with the first pin hole 10, and the locating pin can be completely inserted into the pin hole, so that the connecting part is not loosened due to falling of the locating pin in the later use process, and the stability of the chair in later use is guaranteed.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While the obvious variations or modifications which come out from this are within the scope of the claims which are created by the present utility model.

Claims

1. An installation structure between a chair backrest and armrests, which is characterized in that: the novel back rest comprises a mortise (2) arranged on the back of a back rest (1) and a tenon (4) arranged on the rear end of a handrail (3), wherein the handrail (3) is buckled into the mortise (2) through the tenon (4) to be connected with the mortise; the locking device is arranged between the tenon (4) and the mortise (2), the tenon (4) and the mortise (2) are fixed into a whole, and the connection between the backboard (1) and the handrail (3) is realized.

2. The mounting structure between a chair back and armrests according to claim 1, wherein: the locking device is provided with a mounting hole (5) arranged on the tenon (4) and a screw-connection hole (6) arranged in the tenon groove (2), and a fixing screw (7) passes through the mounting hole (5) and is in screw-connection with the screw-connection hole (6) to fix the tenon (4) in the tenon groove (2).

3. The mounting structure between a chair back and armrests according to claim 2, wherein: the mounting hole (5) is a step hole, and the fixing screw (7) is a countersunk screw which is arranged in the step hole.

4. The mounting structure between a chair back and armrests according to claim 1, wherein: the locking device is provided with a mounting hole (5) arranged on the tenon (4) and an anti-falling hole (8) arranged in the tenon groove (2), and the expansion pin (9) passes through the mounting hole (5) and is in buckling connection with the anti-falling hole (8).

5. The mounting structure between a chair back and armrests of claim 4, wherein: the expansion pin (9) comprises a connecting shaft (91) and a limiting table (92) arranged at one end of the connecting shaft (91), a conical guide table (93) with a small front and a large rear is arranged at the other end of the connecting shaft (91), the diameter of the large diameter end of the conical guide table (93) is larger than that of the connecting shaft (91), a deformation groove (94) extending along the axis direction is formed in the end face of the conical guide table (93), and the deformation groove (94) penetrates through the cylindrical surface of the connecting shaft (91).

6. The mounting structure between a chair back and armrests of claim 5, wherein: the deformation groove (94) is a straight groove.

7. The mounting structure between a chair back and armrests of claim 5, wherein: the deformation grooves (94) are arranged in a cross groove.

8. The mounting structure between a chair back and armrests according to claim 1, wherein: the locking device is a first pin hole (10) arranged on the side wall of the tenon (4) and a second pin hole (11) arranged on the side wall of the tenon groove (2), after the tenon (4) is installed with the tenon groove (2), the first pin hole (10) is communicated with the second pin hole (11), and the locating pin (12) penetrates into the first pin hole (10) after penetrating through the second pin hole (11), so that the tenon (4) and the tenon groove (2) are fixed into a whole.

9. The mounting structure between a chair back and armrests of claim 8, wherein: the locating pin (12) is arranged in a conical rod shape.

10. The mounting structure between a chair back and armrests according to claim 1, wherein: the tenon groove (2) is arranged in a trapezoid groove shape, and correspondingly, the tenon head (4) is arranged in a trapezoid block shape.