TW202325189A - Lumbar cushion stepless adjustment apparatus for chair including a fixed seat, two sliding blocks, a four-bar linkage rod, a lumbar cushion fixing seat and an adjusting rod - Google Patents

Abstract

The invention provides a lumbar cushion stepless adjustment apparatus for a chair, including a fixed seat, two sliding blocks, a four-bar linkage rod, a lumbar cushion fixing seat and an adjusting rod. A left sliding groove and a right sliding groove which correspond to each other are respectively disposed on an upper end surface and a lower end surface of the fixed seat. The two sliding blocks are pivotally connected into the sliding grooves of the fixed seat, and are respectively provided with a transverse screw hole. The two transverse screw holes are in a forward and reverse configuration. The four-bar linkage rod is pivotally connected to upper and lower ends of the two sliding blocks through two-bar linkage rods respectively and jointly pivoted into the sliding grooves of the fixed seat by a fastening member. Gear portions engaged mutually are disposed at the other end of the four-bar linkage rod. The lumbar cushion fixing seat allows the left-right engaged gear portions of the four-bar linkage rod to be pivoted. The adjustment rod horizontally penetrates into the fixed seat, and is respectively provided with two screw tooth segments matching the sliding grooves of the fixed seat in terms of the length. The two screw tooth segments are forward and reverse teeth mutually threaded with the transverse screw holes in the forward and reverse configuration of the two sliding blocks. Accordingly, after an adjustment apparatus is fixed at the back of the chair, a lumbar cushion can be fixed by using the lumbar cushion fixing seat to provide a user with a stepless adjustment of the position of the lumbar cushion supporting the lumbar spine of the user according to different seating positions.

Description

Seat lumbar cushion stepless adjustment device

The invention relates to the technical field of a seat, in particular to a structural designer of a stepless adjustment device for a lumbar cushion of a seat.

Press, No. 102210844 patent case "improved structure of waist support of seat" has been announced, including: a seat, one of the back of the seat is provided with a groove; a waist support mechanism; and a waist support pad body, the The waist support mechanism connects the waist support pad body and is set in the groove. The waist support mechanism includes the waist support pad body and the groove with two connecting rods crossed and pivotally connected in the vertical direction, and the two connecting rods The two ends of a first connecting rod and a third connecting rod in one set are respectively pivotally connected to a moving shaft at the elongated two sliding grooves on a first sliding seat plate integral with the bottom surface of the groove, and the One of the sliding shafts at the two elongated sliding grooves on the second sliding seat plate integrated on the back of the waist support pad body, the two ends of the second connecting rod and the fourth connecting rod of the two connecting rod groups are respectively Pivotally connected to the pivot seat at both ends of a first pivot seat rod integrated on the bottom surface of the groove and the pivot seat at both ends of a second pivot seat rod integrated at the back of the waist support pad body, the moving shaft can also be pivotally connected to a telescopic Cylinder, and a cylinder rod of the telescopic cylinder can pass through a hole in an L-shaped plate seat and then protrude to the bottom of the chair back with a pressure control button. By pressing the pressure control button, the telescopic cylinder can be extended to push the The moving shaft pushes the two connecting rods, and then pushes the waist support pad body forward to be released.

In addition, the No. 093216291 "Adjustable Head and Waist Cushion Structure of Seat" patent case mainly provides accommodating grooves on the back of the seat relative to the head and waist of the human body, so as to provide telescopic and adjustable assembly. head pads and waist pads, so that the head and waist pads of the human body can be used to obtain The best support function is used to enhance the comfort of its sitting posture; the improvement is that: the rear parts of the head and waist pads are respectively equipped with the upper and lower two link groups in the form of cross pivot joints, and the One end of the connecting rod group is respectively fixed on the pivot seat fixed on the head, the back side of the lumbar pad and the backboard on the bottom side of the accommodating groove, while the other end of the connecting rod group is respectively pivoted on the back side of the lumbar pad and the accommodating groove. On the sliding seat provided separately on the back plate of the bottom side of the groove, the long sliding groove preset by the sliding seat gives the other end of the connecting rod group a movable moving margin, and the connecting rod group is pivotally assembled on the bottom side of the accommodating groove. Push rods are set between one end of the sliding seat of the plate, and the push rods are in interlocking relationship with the buckle hooks provided at the base of the telescopic cylinder on one side of the accommodating groove, and a fixed beam is used to connect the telescopic cylinder The frame holder is positioned on the back plate at the bottom of the accommodating groove, and the end of the cylinder rod of the telescopic cylinder is fixed on the side of the back of the chair by a combination piece, and the preset control button at the end of the cylinder rod is directly exposed on the side of the back of the chair. Use a pressing piece to pull the control button to operate the telescopic action of the telescopic cylinder, so as to push or pull the push rod to cause the connecting rod group to expand or retract, and then push the head and waist pad outward or pull inward back.

However, the above two conventional structures are actuated by shear force and controlled by telescopic cylinders. Their structures are complicated, their manufacturing costs are high, their assembly is also very inconvenient, and they are not economical. Therefore, it is necessary to improve them.

In view of the foregoing problems, the inventor has devoted himself to research and development. Therefore, the main purpose of the present invention is to provide a stepless adjustment device for the lumbar cushion of a seat, which can obtain the best support state for the waist of the user's body, so that the user can sit comfortably. When sitting on the seat, it can cooperate with the auxiliary supporting effect of the lumbar cushion, so that there will be no symptoms such as waist fatigue and possible bone deformation caused by long-term sitting; In response to users of different body types, the best comfortable support state can be obtained through proper adjustment of the lumbar cushion, and it can be matched with different sizes of lumbar cushion structures to achieve a 100% support effect on the back of the occupant. and maintain the body in the correct sitting posture.

In order to achieve the above purpose, the present invention provides a stepless adjustment device for the lumbar cushion of a seat, which includes:

A fixed seat, the upper and lower end surfaces of the fixed seat are respectively provided with two corresponding sliding grooves on the left and right;

Two sliding blocks are pivotally connected in the sliding groove of the fixing seat, and are respectively provided with horizontal screw holes, and the two horizontal screw holes are arranged in forward and reverse directions;

The four connecting rods are respectively pivotally connected to the upper and lower ends of the two sliders with two connecting rods, and at the same time are pivotally connected to the sliding groove of the fixed seat with a bolt at the same time, and the other end of the four connecting rods is provided. It is a gear part that can mesh with each other;

A lumbar cushion fixing seat, which is pivotally connected to the left and right gear parts of the four connecting rods in an occlusal shape;

An adjustment rod is horizontally installed in the fixed seat, and is respectively provided with two screw segments matching the length of the sliding groove of the fixed seat. The screw holes are positive and negative teeth that are screwed together.

10: Seat back fixing seat

11, 12: sliding groove

13: Perforation

20, 20': slider

21, 21': Horizontal screw holes

22: Pivot hole

30a, 30b, 30c, 30d: connecting rod

31: gear department

32a, 32b: pivot hole

40: tie piece

50: Lumbar cushion fixing seat

51: Rear end face

52: Second pivot hole

60: The second bolt

70: Adjustment rod

71: Knob

72, 73: thread segment

A, A': Lumbar cushion

The first figure is a three-dimensional exploded schematic view of the present invention.

The second figure is a three-dimensional assembly schematic diagram of the present invention when it is in an extended state.

The third figure is a three-dimensional assembly schematic diagram of the present invention in a condensed state.

The fourth figure is a schematic cross-sectional view of the second figure.

The fifth figure is a schematic cross-sectional view of the third figure.

Figure 6 is a schematic view of the present invention in use when it is condensed.

The seventh figure is a schematic view of the present invention in use when it is stretched out.

Figure 8 is a schematic view of another embodiment of the lumbar support cushion in use according to the present invention.

In order to enable your examiners to further understand the structure, features and other purposes of the present invention, the following preferred embodiments are described in detail with accompanying drawings, but the embodiments described in this illustration are for illustration purposes only. It is not the only restriction on the patent application.

Please refer to Figures 1 and 2, the stepless adjustment device for the lumbar cushion of the seat of the present invention includes:

A chair back fixing seat 10, the upper and lower end surfaces of the chair back fixing seat 10 are respectively provided with left and right two corresponding sliding grooves 11, 12. The frame-shaped body is provided with a perforation 13 on at least one side of the frame surface.

The two sliders 20, 20' are pivotally connected to the sliding grooves 11, 12 of the seat back fixing seat 10, and are respectively provided with transverse screw holes 21, 21', and the two transverse screw holes 21, 21' are positive Arranged inversely, in this embodiment, the two sliders 20, 20' match the inner height of the seat back fixing base 10 and face each other in a ㄈ shape, and the upper and lower end surfaces are provided with pivot holes 22.

The four connecting rods 30a, 30b, 30c, 30d are respectively connected to the upper and lower ends of the two sliders 20, 20' by the two connecting rod pivots 30a, 30b, 30c, 30', and are also pivotally connected to the two sliding blocks 20, 20' by a bolt 40 at the same time. In the sliding grooves 11, 12 of the seat back fixing seat 10, the other ends of the four connecting rods 30a, 30b, 30c, 30d are set as gear parts 31 that can be engaged with each other. Both ends of the rods 30a, 30b, 30c, 30d are provided with pivot holes 32a, 32b for the pivot connection of the bolt 40, and the pivot hole 32a at one end of the gear part 31 is located at the center of the gear part 31.

A lumbar back cushion fixing seat 50 is pivotally connected to the four-linkages 30a, 30b, 30c, and 30d left and right gear parts 31 in an occlusal shape. The rear end surface 51 can be used to fix a waist cushion A, and two second pivot holes 52 are respectively provided on the upper and lower end surfaces for the second bolt 60 to be pivotally connected to the gear part 31 of the four connecting rods 30a, 30b, 30c, 30d. hole 32a.

An adjustment rod 70 is horizontally installed in the seat back fixing seat 10, and one end is exposed outside the seat back fixing seat 10, and a knob 71 is provided, and the shafts positioned in the seat back fixing seat 10 are respectively There are two screw thread segments 72, 73 matching the lengths of the sliding grooves 11, 12 of the seat back fixing seat 10, and the two screw thread segments 72, 73 are arranged forward and reversely with the two sliding blocks 20, 20'. The horizontal screw holes 21, 21' are positive and negative teeth screwed together.

With the composition of the above components, when the two sliders 20, 20' are adjusted to the two side end surfaces of the seat back fixing seat 10 by the adjusting rod 70, the four connecting rods 30a, 30b, 30c, 30d are fixed to the lumbar cushion. The pivotal end of the seat 50 can just be condensed in the seat back fixing seat 10 (as shown in the third and fifth figures), and when the adjusting rod 70 is turned by the knob 71 of the adjusting rod 70, due to the two thread segments 72, 73 positive and negative tooth design, so the two sliders 20, 20 ' can be limited in the sliding grooves 11, 12 of the seat back fixing seat 10 and move towards the middle, and at the same time, the lumbar cushion fixing seat 50 passes through the four The pivotal connection between the connecting rods 30a, 30b, 30c, 30d and the two sliders 20, 20' will produce an outward pushing force, so that the lumbar cushion fixing seat 50 is gradually stretched out (as shown in the second and fourth figures) shown).

After the description of the above embodiments, please continue to refer to the sixth and seventh figures. It can be known that the stepless adjustment device for the waist cushion of the seat of the present invention has the following advantages:

1. The present invention can obtain the best supporting state for the waist of the user's body, so that when the user sits on the seat, it can cooperate with the auxiliary supporting effect of the lumbar cushion A, so as not to have waist fatigue derived from long-term sitting And possible bone deformation and other diseases.

2. The adjustable effect of the stepless lumbar cushion of the present invention enables it to obtain the best comfortable support state through proper adjustment of the lumbar cushion A when responding to users of different body types, effectively solving the problem of existing seats. The lack of perfection.

3. The stepless adjustment device of the lumbar cushion of the present invention can match the structures of lumbar cushions A and A' of different sizes, and when matched with a large-area lumbar cushion A', it can achieve a 100% supporting effect on the back of the occupant. Maintain the correct sitting posture of the body (as shown in the eighth picture).

To sum up, the stepless adjustment device for the lumbar cushion of the seat of the present invention has excellent progressive practicability among similar products. At the same time, the technical information about this type of structure has been checked at home and abroad, and no such structure has been found in the literature. The same structure existed before, therefore, the present invention already meets the requirements for an invention patent, and an application should be filed in accordance with the law.

However, what is described above is only a preferred embodiment of the present invention, so all equivalent structural changes made by applying the description of the present invention and the scope of the patent application should be included in the scope of the patent of the present invention.

10: Seat back fixing seat

11, 12: sliding groove

13: Perforation

20, 20': slider

21, 21': Horizontal screw holes

22: Pivot hole

30a, 30b, 30c, 30d: connecting rod

31: gear department

32a, 32b: pivot hole

40: tie piece

50: Lumbar cushion fixing seat

51: Rear end face

52: Second pivot hole

60: The second bolt

70: Adjustment lever

71: Knob

72, 73: thread segment

Claims (6)

A stepless adjustment device for a lumbar cushion of a seat, comprising: A seat back fixing seat, the upper and lower end surfaces of the seat back fixing seat are respectively provided with two corresponding sliding grooves on the left and right; Two sliding blocks are pivotally connected in the sliding groove of the fixing seat, and are respectively provided with horizontal screw holes, and the two horizontal screw holes are arranged in forward and reverse directions; The four connecting rods are respectively pivotally connected to the upper and lower ends of the two sliders with two connecting rods, and at the same time are pivotally connected to the sliding groove of the fixed seat with a bolt at the same time, and the other end of the four connecting rods is provided. It is a gear part that can mesh with each other; A lumbar cushion fixing seat, which is pivotally connected to the left and right gear parts of the four connecting rods in an occlusal shape; An adjustment rod is horizontally installed in the fixed seat, and is respectively provided with two screw segments matching the length of the sliding groove of the fixed seat. The screw holes are positive and negative teeth that are screwed together. The stepless adjustment device for the lumbar cushion of the seat as described in item 1 of the scope of the patent application, wherein the seat back fixing seat is a frame-shaped body with an open edge on the rear end surface, and a perforation is provided on at least one side of the frame surface. The stepless adjustment device for the lumbar cushion of the seat as described in item 1 of the scope of the patent application, wherein the two sliders match the inner height of the seat back fixing seat and face each other in a ㄈ shape, and the upper and lower end surfaces are provided with pivot holes . The stepless adjustment device for the lumbar cushion of the seat as described in item 1 of the scope of the patent application, wherein the two ends of the four connecting rods are provided with pivot holes for the pivot connection of the bolts, and the pivot holes at one end of the gear part are just at the The center point of the gear unit. For the stepless adjustment device for the lumbar cushion of the seat described in item 1 of the scope of the patent application, the lumbar cushion fixing seat is generally in the shape of a ㄈ, and the rear end surface can be used for fixing a lumbar cushion, and the upper and lower ends are Each is provided with two through holes for the second bolt to be pivotally connected to the pivot holes of the gear portion of the four linkages. The stepless adjustment device for the lumbar cushion of the seat as described in item 1 of the scope of the patent application, wherein one end of the adjustment rod is exposed outside the fixing seat, and a knob is provided.

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