CN112535369A - Backrest lifting mechanism and seat with same - Google Patents

Abstract

The invention discloses a backrest lifting mechanism which is applied to a backrest and comprises a supporting rod, a shell and a rolling part, wherein the supporting rod is arranged on the shell; the support rod is used for supporting the backrest; the shell is connected with the backrest, the shell is sleeved on the support rod and can move along the support rod, and the shell is provided with a friction plate sliding groove for providing friction force; the rolling component is arranged in the friction plate sliding groove and is respectively abutted against the friction plate sliding groove and the supporting rod. The backrest lifting mechanism disclosed by the invention is simple to operate, and can achieve the purpose of facilitating the lifting adjustment of the backrest by a user and improve the use experience of the user.

Description

Backrest lifting mechanism and seat with same

Technical Field

The invention relates to the technical field of seats, in particular to a backrest lifting mechanism and a seat with the same.

Background

The lifting chair can adjust the height of the backrest to meet the sitting posture requirements of different users, and is widely applied to the fields of medical treatment, cosmetology and office. Nowadays, the lifting of the backrest becomes the most basic requirement of the seat, and the existing lifting seat usually needs to realize the loosening and locking of the backrest by screwing a nut so as to adjust or fix the height of the backrest, and the use and operation are troublesome and are not beneficial to adjusting the height of the backrest.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a backrest lifting mechanism and a seat with the same, which are simple to operate and convenient for a user to lift and adjust a backrest.

In a first aspect, an embodiment of the present invention provides a backrest lifting mechanism, which is applied to a backrest, and includes a support rod, a housing, and a rolling component; the support rod is used for supporting the backrest; the shell is connected with the backrest, the shell is sleeved on the support rod and can move along the support rod, and the shell is provided with a friction plate sliding groove for providing friction force; the rolling component is arranged in the friction plate sliding groove and is respectively abutted against the friction plate sliding groove and the supporting rod.

According to the backrest lifting mechanism provided by the embodiment of the invention, at least the following beneficial effects are achieved: the shell of the backrest lifting mechanism is connected with the backrest, the shell is sleeved on the supporting rod, the shell slides downwards along the supporting rod under the action of gravity, a rolling part between the sliding groove of the friction plate and the supporting rod moves upwards due to friction force, in the process that the rolling part rolls upwards, the friction force applied to the rolling part is gradually increased and is tightly abutted to the shell and the supporting rod respectively, so that the relative position of the shell and the supporting rod is fixed, the purpose of locking the backrest is achieved, the height of the backrest is adjustable, therefore, the shell is sleeved on the supporting rod, the shell moves relative to the supporting rod, the rolling part arranged between the shell and the supporting rod rolls along the sliding groove of the friction plate, the relative position of the shell and the supporting rod is fixed, the lifting adjustment of the backrest is achieved, the operation is simple, the purpose of facilitating a user to lift and.

According to some embodiments of the present invention, the cross-sectional area of the friction plate sliding groove is gradually reduced from the bottom end to the top end, and the rolling member provides a supporting force during the upward sliding process, thereby improving the stability of the locking function of the rolling member.

According to some embodiments of the invention, the sliding device further comprises an adjusting structure for driving the rolling component to slide, and the adjusting structure is arranged on the shell, so that the locking of the rolling component to the shell and the supporting rod is released, the adjustment by a user is facilitated, and the use experience of the user is improved.

According to some embodiments of the present invention, the adjusting structure includes a slider and a button, the slider and the button are connected in a matching manner, the slider is provided with a driving rod, the driving rod is located in the sliding groove of the friction plate and above the rolling component, and the button is arranged on the housing, so that the operation is simple and the use by a user is convenient.

According to some embodiments of the invention, the button is provided with a first inclined surface structure, and the slider is provided with a second inclined surface structure matched with the first inclined surface structure, so that the relative position of the shell and the supporting rod can be adjusted by one key, and the button is convenient for a user to use.

According to some embodiments of the invention, the backrest further comprises a cushion structure for supporting the rolling member, the cushion structure being disposed within the friction plate sliding groove and below the rolling member, the cushion structure being capable of providing a shock absorbing cushion effect during adjustment of the height of the backrest.

According to some embodiments of the invention, the housing further comprises a guide block for limiting the movement of the housing on the support bar, the guide block being disposed on a side of the housing adjacent to the support bar, the guide block being capable of keeping the housing moving parallel on the support bar.

According to some embodiments of the invention, the bottom end of the housing is provided with a detachable cover, which facilitates maintenance, replacement and detachment by a user.

According to some embodiments of the invention, the surface of the rolling component is provided with a protective layer, so that the friction force between the rolling component and the shell and between the rolling component and the support rod is increased, and the stability of the backrest lifting mechanism is improved.

In a second aspect, embodiments of the present invention also provide a seat, including a backrest lifting mechanism as described in the first aspect above.

Because the seat of the embodiment of the invention has the structure of the backrest lifting mechanism of the embodiment of the first aspect, the shell of the backrest lifting mechanism is connected with the backrest, and the shell is sleeved on the support rod and slides downwards along the support rod under the action of gravity. Therefore, the rolling member disposed between the slide groove of the friction plate and the support bar is moved upward by the frictional force generated by the downward sliding of the housing. Along with the rolling part slides upwards along the sliding groove of the friction plate, the friction force received by the rolling part is gradually increased, so that the rolling part is tightly abutted against the shell and the supporting rod, the relative position between the shell and the supporting rod is fixed, the purpose of locking the backrest by the rolling part is achieved, and the height of the backrest can be adjusted. Therefore, the casing moves relative to the supporting rod, the height of the backrest is adjusted, the rolling part rolls along the sliding groove of the friction plate, the relative position of the casing and the supporting rod is fixed under the action of friction force, and therefore the purpose of lifting and adjusting the backrest is achieved, operation is simple, a user can conveniently lift and adjust the backrest, and use experience of the user is improved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a backrest lifting mechanism according to some embodiments of the first aspect of the present invention;

FIG. 2 is a sectional view of the structure of the portion A in FIG. 1;

FIG. 3 is a schematic illustration of a seat according to some embodiments of the second aspect of the present invention.

Reference numerals: the backrest lifting mechanism 100, the backrest 110, the support rod 120, the housing 130, the friction plate sliding groove 140, the rolling component 150, the adjusting structure 160, the slider 170, the driving rod 171, the button 180, the rail block 190, the cover 200, the buffer structure 210 and the seat 220.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

The invention provides a backrest lifting mechanism, which is applied to a backrest and comprises a shell, a support rod and a rolling component, wherein the shell of the backrest lifting mechanism is connected with the backrest, the shell is sleeved on the support rod, the shell slides downwards along the support rod under the action of gravity, the rolling component positioned between a sliding groove of a friction plate and the support rod moves upwards due to friction, and in the process of rolling the rolling component upwards, the friction force borne by the rolling component is gradually increased and is respectively and tightly abutted against the shell and the support rod, so that the relative position of the shell and the support rod is fixed, the purpose of locking the backrest is achieved, the lifting adjustment of the backrest is realized, the operation is simple, the purpose of conveniently adjusting the backrest by lifting of a user is achieved, and the use experience of the user.

The embodiments of the present invention will be further explained with reference to the drawings.

In a first aspect, an embodiment of the present invention provides a backrest lifting mechanism 100.

With reference to fig. 1 and 2, it can be understood that the housing 130 is connected to the backrest 110, and the housing 130 is sleeved on the supporting rod 120 and can move up or down along the supporting rod 120, so as to drive the backrest 110 to adjust up and down. The housing 130 is further provided with a sliding groove 140, wherein a rolling member 150 is disposed in the sliding groove 140, the rolling member 150 abuts against the housing 130 and the sliding groove 140, and when the rolling member 150 slides along the sliding groove 140, the sliding groove 140 provides a friction force for the rolling member 150, thereby improving the sliding stability of the rolling member 150. The housing 130 and the backrest 110 are under the action of gravity or the downward force generated by the sitting action of the user, the housing 130 moves downward along the supporting column, and since the rolling member 150 abuts against the friction plate sliding groove 140, the friction plate sliding groove 140 moves downward along with the housing 130, and the friction plate sliding groove 140 provides the rolling member 150 with a friction force moving upward. Under the limit of the support rod 120, as the rolling component 150 continuously slides upwards along the friction plate sliding groove 140, the friction force of the friction plate sliding groove 140 on the rolling component 150 is continuously increased until the rolling component 150 stops sliding due to the friction force exerted by the friction plate sliding groove, so that the relative positions of the shell 130 and the support column can be fixed at will within the length range of the support rod 120, the rolling component 150 is locked to lift the backrest 110, the function of adjusting the lifting of the backrest 110 is achieved, the operation is simple, and the backrest 110 can be conveniently adjusted by the user through lifting.

As can be understood from fig. 2, the cross-sectional area of the friction plate runner 140 is gradually reduced from the bottom end to the top end, the contact surface of the friction plate runner 140 with the rolling member 150 is inclined, thus, when the backrest lifting mechanism 100 is in a static state, the backrest 110 and the housing 130 are driven by gravity to move the friction plate sliding grooves 140 downward, the rolling members 150 located between the friction plate sliding grooves 140 and the supporting posts move upward due to the friction force provided by the friction plate sliding grooves 140, since the contact surface between the friction plate runner 140 and the rolling member 150 is an inclined surface, as the rolling member 150 slides upward along the friction plate runner 140, the rolling member 150 receives a greater frictional force until it stops sliding, fixing the relative positions of the housing 130 and the support column, thus, it is achieved that the housing 130 is fixed at any position within a limited length range of the support column, namely, the backrest 110 is locked to be lifted, the operation is simple, and the lifting adjustment of the backrest 110 is convenient for a user.

It should be noted that the purpose of the cross-sectional area of the friction plate sliding groove 140 gradually decreasing from the bottom end to the top end is to increase the friction force to which the rolling member 150 is subjected during sliding upward along the friction plate sliding groove 140. The contact surface between the friction plate sliding groove 140 and the rolling member 150 may be an inclined surface or a curved surface, which is not particularly limited in this embodiment. For example, the contact surface between the friction plate sliding groove 140 and the rolling member 150 may be gradually rough from the bottom end to the top end, or may be a curved surface, so that the friction force applied to the rolling member 150 during the upward sliding process along the friction plate sliding groove 140 is continuously increased, thereby stopping the sliding of the rolling member 150 due to the excessive friction force, and locking the lifting of the backrest 110.

With reference to fig. 1 and fig. 2, it can be understood that the backrest lifting mechanism 100 is further provided with an adjusting structure 160, the adjusting structure 160 can drive the rolling component 150 to slide downwards along the friction plate sliding groove 140, so that the friction force of the rolling component 150 caused by the friction plate sliding groove 140 and the supporting rod 120 is reduced, the rolling component 150 can slide in the friction plate sliding groove 140, the fixing of the relative position between the housing 130 and the supporting column is released, that is, the locking effect of the rolling component 150 on the backrest 110 is released, the backrest 110 and the housing 130 can slide and lift along the supporting rod 120, and the backrest 110 can be conveniently lifted and lowered by a user.

Referring to fig. 2, it can be understood that the adjusting mechanism 160 includes a slider 170 and a button 180 that are coupled to each other, and the slider 170 and the button 180 are disposed in the housing 130, wherein the slider 170 is further provided with a driving rod 171, and the driving rod 171 is disposed in the friction plate sliding groove 140 and above the rolling member 150. The button 180 is pushed, the button 180 drives the slider 170 to move, the driving rod 171 of the slider 170 moves downwards to push the rolling part 150 in a locking state, so that the rolling part 150 slides downwards, the relative position of the shell 130 and the supporting column is unlocked, the shell 130 and the backrest 110 can move upwards or downwards along the supporting column to lift, and therefore the backrest 110 is unlocked through the matching of the button 180 and the slider 170, the operation is simple, and the backrest 110 can be conveniently lifted and lowered by a user.

With reference to fig. 2, it will be appreciated that the button 180 is provided with a first ramp structure on the contact surface with the slider 170, and correspondingly, the slider 170 is provided with a second ramp structure matching the first ramp structure on the contact surface with the button 180. The button 180 can slide in the housing 130, when a user presses the button 180, a first inclined surface structure of the button 180 is matched with a second inclined surface structure of the slider 170, the slider 170 drives the driving rod 171 to move downwards to push away the rolling component 150, fixing of the relative position between the housing 130 and the supporting rod 120 is released, and the housing 130 and the backrest 110 can move upwards or downwards along the supporting column to lift, so that the button 180 and the slider 170 can release locking of the backrest 110 through one key through the inclined surface structures, the backrest 110 is lifted and lowered, the operation is simple, and the lifting and adjusting operation of the backrest 110 can be conveniently carried out by the user.

With reference to fig. 2, it can be understood that a buffer structure 210 is disposed in the friction plate sliding groove 140, and the buffer structure 210 is located below the rolling member 150, and the buffer member can support the rolling member 150 to slide upwards, and can also provide a shock-absorbing buffer function for the rolling member 150 during the downward sliding process of the rolling member 150 under the action of an external force, so as to prevent the rolling member 150 from sliding downwards too fast, and the backrest 110 suddenly descends to damage the backrest 110 or cause a danger, and the rolling member 150 slides downwards slowly under the action of the buffer member, so that the backrest 110 and the housing 130 can be lifted and lowered slowly. It should be noted that the buffering structure 210 may be a spring, rubber, or sponge, and this embodiment is not limited to this. In addition, the buffer member may be connected to the rolling member 150, so as to absorb shock and buffer in the upward rolling process of the rolling member 150, thereby preventing the rolling member 150 from being damaged due to excessive friction force caused by too high upward moving speed of the rolling member 150, and preventing the relative position between the housing 130 and the support rod 120 from being fixed. Therefore, the buffering component is arranged in the friction plate sliding groove 140 and below the rolling component 150, so that the rolling component 150 can slide to provide damping, buffering and supporting functions, the stability and safety of the backrest lifting mechanism 100 can be improved, and the use experience of a user can be improved.

It can be understood that the casing 130 is provided with the guide rail block 190 on a side close to the support column, and the guide rail block 190 can limit the casing 130 to move on the support column, and always keep moving parallel to the vertical support column, so that the backrest 110 can vertically lift, and the backrest 110 after being lifted and lowered can support the back of a user, thereby improving the use experience of the user. In addition, the guide rail block 190 can improve the bearable capacity of the housing 130, the support column and the backrest 110, improve the safety and stability of the backrest lifting mechanism 100, and improve the user experience.

With reference to fig. 2, it can be understood that a cover 200 is disposed at the bottom end of the housing 130, the cover 200 is detachably connected to the housing 130, and the cover 200 can hold the rail block 190, so that the rail block 190 can move up and down along with the housing 130, and the housing 130 can move parallel along the supporting column under the limitation of the rail block 190. In addition, the detachably connected cover 200 can facilitate the detachment, maintenance and replacement of components in the housing 130, thereby improving the user experience.

It should be noted that the friction plate sliding groove 140 may be disposed on the housing 130, or may be disposed on the guide rail block 190, and the guide rail block 190 moves synchronously with the housing 130 under the supporting effect of the cover 200, so that the friction plate sliding groove 140 disposed on the guide rail block 190 can move along with the housing 130, and can cooperate with the rolling component 150 to fix the relative position of the housing 130 and the support column, and lock the backrest 110 to move up and down. When the friction plate sliding groove 140 is damaged and needs to be replaced, if the friction plate sliding groove 140 is arranged on the guide rail block 190, only the sealing cover 200 can be detached to replace the guide rail block 190 to complete maintenance, the shell 130 does not need to be replaced, maintenance is simple and convenient, maintenance cost is reduced, and user experience is improved.

It can be understood that the surface of the rolling member 150 is provided with a protective layer, and the protective layer can increase the friction between the rolling member 150 and the friction plate sliding groove 140 and the supporting column, improve the locking effect of the rolling member 150 on the relative position of the housing 130 and the supporting column, and improve the stability of the lifting adjustment of the backrest 110. In addition, the protective layer can also provide a shock absorption and buffering function for the rolling member 150, and play a role in protecting the rolling member 150 from being damaged, thereby improving durability and stability of the backrest lifting mechanism 100.

In a second aspect, embodiments of the present invention further provide a chair 220, including the backrest lifting mechanism 100 as in the first aspect of the present invention.

Referring to fig. 3, it can be understood that the chair 220 according to the embodiment of the present invention includes the backrest lifting mechanism 100 as described in the first embodiment, the housing 130 of the backrest lifting mechanism 100 is connected to the backrest 110, and the housing 130 is sleeved on the support rod 120 and slides downward along the support rod 120 due to gravity. Accordingly, the rolling member 150 disposed between the friction plate chute 140 and the support bar 120 is moved upward by the frictional force generated by the downward sliding of the housing 130. As the rolling member 150 slides upward along the friction plate sliding groove 140, the friction force received by the rolling member 150 is gradually increased, so as to tightly abut against the housing 130 and the support bar 120, fix the relative position between the housing 130 and the support bar 120, achieve the purpose of locking the backrest 110 by the rolling member 150, and achieve the height adjustment of the backrest 110. Therefore, the housing 130 moves relative to the supporting rod 120 to adjust the height of the backrest 110, the rolling component 150 rolls along the friction plate sliding groove 140, and the relative position of the housing 130 and the supporting rod 120 is fixed under the action of friction force, so that the purpose of adjusting the backrest 110 in a lifting manner is achieved, the operation is simple, a user can conveniently adjust the backrest 110 in a lifting manner, and the use experience of the user is improved.

Since the seat 220 in this embodiment and the backrest lifting mechanism 100 in the above embodiment belong to the same inventive concept, other specific embodiments of the seat 220 in this embodiment may refer to the specific embodiment of the backrest lifting mechanism 100 in the above embodiment, and in order to avoid redundancy, further description of other specific embodiments of the seat 220 in this embodiment is omitted here.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A backrest lifting mechanism applied to a backrest, comprising:

a support bar for supporting the backrest;

the shell is connected with the backrest, sleeved on the support rod and capable of moving along the support rod, and provided with a friction plate sliding groove for providing friction force;

and the rolling component is arranged in the friction plate sliding groove and is respectively abutted against the friction plate sliding groove and the supporting rod.

2. The backrest lifting mechanism according to claim 1, wherein the friction plate runner has a cross-sectional area that gradually decreases from a bottom end to a top end.

3. The backrest lift mechanism of claim 1, further comprising an adjustment structure for driving the rolling member to slide, the adjustment structure being disposed on the housing.

4. The backrest lifting mechanism according to claim 3, wherein the adjusting mechanism comprises a slider and a button which are connected in a matching manner, the slider is provided with a driving rod, the driving rod is positioned in the friction plate sliding groove and above the rolling component, and the button is arranged on the housing.

5. The backrest raising and lowering mechanism according to claim 4, wherein said button is provided with a first ramp structure and said slider is provided with a second ramp structure matching said first ramp structure.

6. The backrest lift mechanism of claim 1, further comprising a cushioning structure for supporting the rolling members, the cushioning structure being disposed within a friction plate runner and below the rolling members.

7. The backrest lifting mechanism according to claim 1, wherein the housing further comprises a guide block for limiting the movement of the housing on the support bar, the guide block being disposed on a side of the housing adjacent to the support bar.

8. The backrest raising and lowering mechanism according to claim 1, wherein the bottom end of the housing is provided with a removable cover.

9. The backrest lifting mechanism according to any one of claims 1 to 8, wherein a surface of the rolling member is provided with a protective layer.

10. A seat comprising a backrest lifting mechanism as claimed in any one of claims 1 to 9.

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