CN103300620B - A kind of anti-bow-backed seat - Google Patents

Abstract

The invention discloses a chair, in particular to an anti-hunchback seat, which comprises: a chair back and chair legs, and is characterized in that it also includes an upper half leg and a lower half leg that can translate in a vertical direction; A sensing unit, the sitting position sensing unit is located on the back of the chair and is used to sense the pressure of the person on the back of the chair; a locking device is used to lock the first rack and the first gear , the tightening device is connected to the sitting posture sensing unit. The anti-hunchback seat is easy to use without making people uncomfortable, and a reminder will be issued when the sitting posture is not correct.

Description

A kind of anti hunchback seat

technical field

The invention relates to a chair, in particular to an anti-hunchback seat.

Background technique

Standardizing the student's sitting posture helps prevent hunched backs, where the student's back does not touch the back of the chair, or only touches the upper part of the back of the chair. Once the student bends down and sits in an improper posture, his back will have a greater contact force with the lower part of the chair back. Some existing anti-hunchback seats adopt the method of adjusting the height of the seat or fixing the student's body with a strap, which has the disadvantages of inconvenient use and uncomfortable use, and the student cannot be reminded when the sitting posture is improper.

Contents of the invention

(1) Technical problems to be solved

The technical problem to be solved by the present invention is to solve the shortcomings of the existing anti-hunchback seats, which are inconvenient to use, uncomfortable to use and unable to remind.

(2) Technical solutions

In order to solve the above-mentioned technical problems, the present invention provides an anti-hunchback seat, comprising: a chair back and a chair leg, and the chair leg also includes an upper half leg, a lower half leg, a first rack and a first gear meshed with each other , the upper half-leg and the lower half-leg are connected by a first rack and a first gear, so as to realize mutual translation in a nearly vertical direction, and the upper half-leg and the lower half-leg are provided With return spring;

The anti-hunchback seat also includes: a sitting position sensing unit, the sitting position sensing unit is located on the back of the seat and is used to sense the pressure of a person on the back of the seat;

A locking device for locking the first rack and the first gear, the tightening device is connected to the sitting posture sensing unit, and has two states, when the sitting posture sensing unit does not sense When the pressure of the person is in the locked state, the first gear is fixed on the first rack; when the sitting posture sensing unit senses the pressure of the person, it is in the unlocked state, and the first gear can be in the move on the first rack.

Wherein, the chair legs are two rear legs close to the back of the chair, the upper half leg is a tubular structure, and a connecting rod sliding groove is provided on one side, and the first rack is arranged on the upper half leg internally, said lower half-legs are mutually translatable in a nearly vertical direction within said upper half-legs;

The sitting posture sensing unit includes: a backrest with a second rack on one side, a spring and a second gear and a gear box engaged with the second rack, the backrest is arranged on the chair back through the spring , and can move relative to the chair back when under pressure, the second rack is aligned with the chair back, and the second gear is arranged on the chair back through the gear box;

The locking device includes a connecting rod provided with a ratchet, a pawl cooperating with the ratchet and a wire for driving the pawl, one end of the wire is connected to the pawl, and the other end is connected by the ratchet. When the second gear rotates, the two ends of the connecting rod are respectively arranged in the sliding groove of the connecting rod and can move along the sliding groove of the connecting rod. The first gear is respectively fixed on the two ends of the connecting rod. end; when the backrest is not under the pressure of the person, the locking device is in the locked state, and the pawl snaps into the ratchet wheel; when the backrest is under the pressure of the person, the locking device In the unlocked state, the pawl is disengaged from the ratchet.

Wherein, the chair legs are two rear legs close to the back of the chair, the lower half leg is a tubular structure, and a connecting rod sliding groove is provided on one side, and the first rack is arranged on the lower half leg internally, said upper half-legs are mutually translatable in a near-vertical direction inside said lower half-legs;

The sitting posture sensing unit includes: a backrest with a second rack on one side, a spring and a second gear and a gear box engaged with the second rack, the backrest is arranged on the chair back through the spring , and can move relative to the chair back when under pressure, the second rack is aligned with the chair back, and the second gear is arranged on the chair back through the gear box;

The locking device includes a connecting rod provided with a ratchet, a pawl cooperating with the ratchet and a wire for driving the pawl, one end of the wire is connected to the pawl, and the other end is connected by the ratchet. When the second gear rotates, the two ends of the connecting rod are respectively arranged in the sliding groove of the connecting rod and can move along the sliding groove of the connecting rod. The first gear is respectively fixed on the two ends of the connecting rod. end; when the backrest is not under the pressure of the person, the locking device is in the locked state, and the pawl snaps into the ratchet wheel; when the backrest is under the pressure of the person, the locking device In the unlocked state, the pawl is disengaged from the ratchet.

Wherein, the chair back is further provided with a folding chair back for pushing the backrest, and the upper end of the folding chair back can rotate around the chair back.

Wherein, the locking device further includes a fixed pulley, the fixed pulley is arranged on the chair back, and the wire slides on the surface of the fixed pulley.

(3) Beneficial effects

The anti-hunchback seat of the present invention does not need to be adjusted by people, and does not need to be bound by straps, so it is convenient and comfortable to use. When the sitting posture is not correct, the seat will automatically control the contraction of the chair legs, and send a slight reminder to supervise People change their sitting positions and thus become more humane.

Description of drawings

Fig. 1 is the front view of anti-hunchback seat of the present invention;

Fig. 2 is the left view of the anti-hunchback seat in Fig. 1;

Fig. 3 is a schematic diagram of the connection structure of the upper half leg and the lower half leg of the anti-hunchback seat in Fig. 1;

Fig. 4 is a cross-sectional view of the connection structure of the upper half leg, the lower half leg and the connecting rod of the anti-hunchback seat in Fig. 1;

Fig. 5 is the A direction view of the upper half leg of the anti-hunchback seat in Fig. 4;

Fig. 6 is a structural schematic diagram of a sitting posture sensing unit of the anti-hunchback seat in Fig. 1;

Among them: 1, chair back; 101, folding chair back; 2, chair leg; 201, upper half leg; 202, lower half leg; 203, first rack; 204, first gear; 205, return spring; 301, 302, backrest; 303, spring; 304, second gear; 305, gear box; 306, gear shaft; 401, ratchet; 402, connecting rod; 403, ratchet; 404, line; 405, fixed pulley.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

The anti-hunchback seat shown in Figures 1 to 6 includes a chair back 1 and two chair legs 2 on one side of the chair back 1, and the chair legs 2 include an upper half leg 201, a lower half leg 202, and are engaged with each other. The first rack 203 and the first gear 204, the upper half leg 201 is a tubular structure, and a connecting rod sliding groove 206 is provided on one side, the first rack 203 is fixed inside, and the lower half leg 202 is inserted into the upper half leg 201 , and can translate with the upper half leg 201 in the vertical direction, and a return spring 205 is also connected between the upper half leg 201 and the lower half leg 202, which is used to stretch the upper half leg 201 and the lower half leg 202 to a certain extent. distance.

The anti-hunchback seat also includes a sitting posture sensing unit, which includes a backrest 302 with a second rack 301 on one side, a spring 303 , a second gear 304 and a gear box 305 meshing with the second rack 301 . The backrest 302 is located at the lower part of the chair back 1 , and the specific position can be determined by asking the user to bend down and look at the contact point between his back and the chair back 1 . The backrest 302 is connected on the chair back 1 through the spring 303, the second rack 301 is aligned with the chair back 1, and passes through the hole on the chair back 1, the backrest 302 can move relative to the chair back 1 when being pressed, and drives the tooth The bar 301 rotates the gear 304. Gear 304 is installed on the back side of chair back 1 through gear box 305, and gear 304 is provided with the gear rotating shaft 306 that can take up line. The spring 303 is used to reset the backrest 302 .

The anti-hunchback seat also includes a locking device for locking the first rack 203 and the first gear 204, which includes a connecting rod 402 provided with a ratchet 401, a pawl 403 that cooperates with the ratchet 401, and is used to drive The line 404 of the pawl 403 . One end of the wire 404 is connected to the ratchet 403 , and the other end is wound on the gear shaft 306 , and can be rewound or unwound by the gear shaft 306 . (When is the length of the line appropriate?) The two ends of the connecting rod 402 are respectively arranged in the connecting rod sliding groove 206 on the chair leg 2 and can slide therein. The two ends of the connecting rod 402 are respectively fixedly connected with the first gear 204 , so that when the two first gears 204 move on the first rack 203 simultaneously, they can drive the connecting rod 402 to move together. The ratchet 401 is fixed near the center of the connecting rod 402 . The locking device has two states. In the locked state, the ratchet 403 snaps into the ratchet 401, and the connecting rod 402 cannot rotate. In the unlocked state, the ratchet 403 breaks away from the ratchet 401, and the connecting rod 402 can rotate.

The working principle of the anti-hunchback seat is that when no one is using it, the backrest 302 is separated from the chair back 1 by a set distance under the support of the spring 303 . The ratchet 403 is locked into the ratchet 401 , the connecting rod 402 cannot rotate, and the first gear 204 cannot move mutually in the first rack 203 , so that the upper half leg 201 and the lower half leg 202 remain stationary. The wire 404 is tightened and wound on the gear shaft 306 , and the upper half leg 201 and the lower half leg 202 are stretched a certain distance by the return spring 205 .

During use, if the person's sitting posture is correct, the back does not contact with the backrest 302 or the contact force is very small, the backrest 302 cannot be pressed to move, and the anti-hunchback seat will not change at this moment.

If the person's sitting posture is not correct, the backrest 302 will be in strong contact with the backrest 302, and the backrest 302 will be pressed to move towards the chairback 1, which will drive the second rack 301 to move and the second gear 304 to rotate. When the wire 404 is wound up when the second gear 304 rotates, it will drag the ratchet 403 to disengage from the ratchet 401 , so that the first gear 204 and the first rack 203 can move with each other. Due to human gravity, the upper half leg 201 with the first rack 203 is shortened downward relative to the lower half leg 202. By adjusting the elastic force of the return spring 205, the contraction distance of the upper half leg 201 can be adjusted to be relatively small. Amplitude. At this time, the person will receive a reminder due to a slight imbalance, thereby changing the sitting posture.

When the person's sitting posture returns to a straight state, the upper half leg 201 returns to the starting position under the support of the return spring 205 . The backrest 302 returns to the starting position under the support of the spring 303, the second gear 304 rotates, the wire 404 is unwound, and the pawl 403 is re-engaged in the ratchet 401 to realize a stable connection between the upper half leg 201 and the lower half leg 202.

In other embodiments of the present invention, any one or more chair legs can also be set as the above-mentioned upper half leg and lower half leg structure.

In other embodiments of the present invention, the lower half of the leg can also be a tubular structure, the first rack is fixed inside, the upper half of the leg is inserted into the lower half of the leg for translation in the vertical direction, and the first gear is fixed by a connecting rod on the upper leg.

In a preferred embodiment of the present invention, the chair back 1 is also provided with a folding chair back 101, the upper end of the folding chair back 101 is connected to the upper part of the chair back 1, the lower end can rotate around the upper end, and can push the backrest 302 when under pressure , the folding chair back 101 is used to support the back of the person to obtain comfort.

In a preferred embodiment of the present invention, the locking device also includes a fixed pulley 405, the fixed pulley 405 is arranged on the chair back 1, and the wire 404 passes through the fixed pulley 405 and slides on its surface, so that the wire 404 can be more Drive the pawl 403 smoothly.

The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Those of ordinary skill in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all Equivalent technical solutions also belong to the category of the present invention, and the scope of patent protection of the present invention should be defined by the claims.

Claims (4)

1. An anti-hunchback chair, comprising: a chair back and chair legs, characterized in that, said chair legs also include an upper half leg, a lower half leg, a first rack and a first gear meshed with each other, said upper The half-leg and the lower half-leg are connected by a first rack and a first gear to achieve mutual translation in a nearly vertical direction, and a return spring is provided between the upper half-leg and the lower half-leg; The anti-hunchback seat also includes: a sitting position sensing unit, the sitting position sensing unit is located on the back of the seat and is used to sense the pressure of a person on the back of the seat; A locking device for locking the first rack and the first gear, the locking device is connected to the sitting posture sensing unit, and has two states, when the sitting posture sensing unit does not sense When the pressure of the person is in the locked state, the first gear is fixed on the first rack; when the sitting posture sensing unit senses the pressure of the person, it is in the unlocked state, and the first gear can be in the The chair legs are two rear legs close to the back of the chair, the upper half leg is a tubular structure, and one side is provided with a connecting rod sliding groove, and the first rack is provided with within said upper half-leg, said lower half-legs are mutually translatable in a nearly vertical direction within said upper half-leg; The sitting posture sensing unit includes: a backrest with a second rack on one side, a spring and a second gear and a gear box engaged with the second rack, the backrest is arranged on the chair back through the spring , and can move relative to the chair back when under pressure, the second rack is aligned with the chair back, and the second gear is arranged on the chair back through the gear box; The locking device includes a connecting rod provided with a ratchet, a pawl cooperating with the ratchet and a wire for driving the pawl, one end of the wire is connected to the pawl, and the other end is connected by the ratchet. When the second gear rotates, the two ends of the connecting rod are respectively arranged in the sliding groove of the connecting rod and can move along the sliding groove of the connecting rod. The first gear is respectively fixed on the two ends of the connecting rod. end; when the backrest is not under the pressure of the person, the locking device is in the locked state, and the pawl snaps into the ratchet wheel; when the backrest is under the pressure of the person, the locking device In the unlocked state, the pawl is disengaged from the ratchet. 2. An anti-hunchback seat, comprising: a chair back and chair legs, characterized in that, said chair legs also include an upper half leg, a lower half leg, a first tooth rack and a first gear meshed with each other, said upper The half-leg and the lower half-leg are connected by a first rack and a first gear to achieve mutual translation in a nearly vertical direction, and a return spring is provided between the upper half-leg and the lower half-leg; The anti-hunchback seat also includes: a sitting position sensing unit, the sitting position sensing unit is located on the back of the seat and is used to sense the pressure of a person on the back of the seat; A locking device for locking the first rack and the first gear, the locking device is connected to the sitting posture sensing unit, and has two states, when the sitting posture sensing unit does not sense When the pressure of the person is in the locked state, the first gear is fixed on the first rack; when the sitting posture sensing unit senses the pressure of the person, it is in the unlocked state, and the first gear can be in the Move on the first rack; The chair legs are two rear legs close to the back of the chair, the lower half leg is a tubular structure, and a connecting rod sliding groove is provided on one side, the first rack is arranged inside the lower half leg, said upper half-legs are mutually translatable in a nearly vertical direction inside said lower half-legs; The sitting posture sensing unit includes: a backrest with a second rack on one side, a spring and a second gear and a gear box engaged with the second rack, the backrest is arranged on the chair back through the spring , and can move relative to the chair back when under pressure, the second rack is aligned with the chair back, and the second gear is arranged on the chair back through the gear box; The locking device includes a connecting rod provided with a ratchet, a pawl cooperating with the ratchet and a wire for driving the pawl, one end of the wire is connected to the pawl, and the other end is connected by the ratchet. When the second gear rotates, the two ends of the connecting rod are respectively arranged in the sliding groove of the connecting rod and can move along the sliding groove of the connecting rod. The first gear is respectively fixed on the two ends of the connecting rod. end; when the backrest is not under the pressure of the person, the locking device is in the locked state, and the pawl snaps into the ratchet wheel; when the backrest is under the pressure of the person, the locking device In the unlocked state, the pawl is disengaged from the ratchet. 3. The anti-hunchback seat according to claim 1 or 2, wherein the chair back is also provided with a folding chair back for pushing the backrest, and the upper end of the folding chair back can wrap around the chair back rotate. 4. The anti-hunchback seat according to claim 1 or 2, wherein the locking device further comprises a fixed pulley, the fixed pulley is arranged on the back of the chair, and the wire slides on the fixed pulley surface.