CN218558660U - Seat headrest structure and seat - Google Patents

Abstract

The utility model relates to a seat headrest structure and seat, it includes: a headrest body including a first body portion and a second body portion, the first body portion including a vertically extending side wall; a headrest rod protruding to the outside through the headrest body and fixedly and variably arranged; an up-down adjustment mechanism configured to drive the headrest main body to move in a vertical direction as a whole; and a fore-aft adjustment mechanism comprising fore-aft drive means for providing a drive motion in a vertical direction and motion conversion means, wherein the motion conversion means comprises a slider structure connected to an output of the fore-aft drive means and a guide track arranged on a side wall of the first body portion, the first body portion being urged by sliding of the slider structure in the guide track to perform a translational motion in a fore-aft direction extending in a horizontal plane relative to the second body portion.

Description

Seat headrest structure and seat

Technical Field

The present invention relates to a seat headrest structure and a seat having such a seat headrest structure.

Background

The car seat is designed to be adjustable in height of a headrest in order to adapt to users of different body sizes. Usually, the user first needs to release the locking action of the stop structure and manually adjust it to a certain height, in particular a stepped preset height, and finally fix the headrest at this preset height by means of the stop structure. This manual adjustment is inconvenient for the user and the graduated adjustment does not match the user's requirements precisely.

Furthermore, in order to provide better support for the head and neck of the passenger, a four-way adjustable seat headrest is also known from the prior art, the adjustment of which in the front-rear direction is effected directly by means of a motor spindle, which undoubtedly increases the size of the headrest and is less aesthetically pleasing.

SUMMERY OF THE UTILITY MODEL

According to various aspects, it is an object of the present invention to provide a seat headrest structure, in particular a four-way adjustable seat headrest structure, which can be adjusted more easily and with a reduced space requirement, and a seat with such a headrest structure.

Furthermore, the present invention also aims to solve or alleviate other technical problems existing in the prior art.

The utility model discloses a provide a seat headrest structure solves above-mentioned problem, particularly, it includes:

a headrest body including a first body portion and a second body portion, the first body portion including a vertically extending side wall;

a headrest rod protruding to the outside through the headrest body and fixedly variably arranged;

an up-down adjustment mechanism provided to drive the headrest main body to move in a vertical direction as a whole; and

a front-rear adjusting mechanism including a front-rear driving device for providing driving motion in a vertical direction and a motion converting device,

wherein the motion conversion means comprises a slider structure connected to an output of the forward and backward drive means and a guide track arranged on a side wall of the first body portion, the first body portion being urged to perform a translational motion in a forward and backward direction relative to the second body portion by sliding of the slider structure in the guide track, the forward and backward direction extending in a horizontal plane.

According to the utility model discloses a seat headrest structure that an aspect provided, front and back drive arrangement including fix at the second driving motor of second main part department, with second driving motor rotate the lead screw of connection, be used for with lead screw thread fit's screw thread seat and be used for fixing the fixed bolster of screw thread seat the tip department of fixed bolster is fixed with respectively slider structure, slider structure can slide in the guide track of first main part department.

According to an aspect of the present invention, there is provided a seat headrest structure, wherein the slider structure is a pin-shaped member, and the guide rail is arranged obliquely with respect to the vertical direction on the side wall.

According to an aspect of the present invention, there is provided a seat headrest structure, the slider structure including two guide bars angled to each other and pivotably connected, a first guide bar of the two guide bars being connected with one end thereof to an output end of a front-rear driving device and pivotably fixed with the other end thereof at a side wall of the first body portion; the second of the two guide bars is pivotably fixed at its one end at the second body portion and is accommodated at its other end in the guide rail.

According to an aspect of the present invention, there is provided a seat headrest structure, wherein the first main body portion is connected to the second main body portion by insertion, and an insertion slot is provided at one of the first main body portion and the second main body portion, and an insertion protrusion is provided at the other of the first main body portion and the second main body portion, and the insertion protrusion can be slidably moved in the insertion slot in the front-rear direction.

According to an aspect of the present invention, there is provided a seat headrest structure, wherein the side wall is integrally formed with the first main body portion, and the side wall is provided with a hollow structure.

According to an aspect of the present invention, there is provided a seat headrest structure, wherein a slide protrusion is disposed at a top of the side wall, an elastic buffer is attached to the slide protrusion, and accordingly, a receiving rail for receiving the slide protrusion is provided at the second main body portion, and the slide protrusion can be slidably moved in the front-rear direction along the receiving rail.

According to an aspect of the present invention, there is provided a seat headrest structure, wherein the elastic buffer member is configured as a hollow member and has an outer peripheral edge in a wave shape.

According to an aspect of the present invention, there is provided a seat headrest structure, wherein a spring element is fixed between the first main body portion and the second main body portion for reducing vibration generated when the first main body portion moves relative to the second main body portion.

According to another aspect of the present invention, there is also provided a seat having the seat headrest structure set forth above, which will not be described herein again.

The seat headrest structure according to the present disclosure can omit an optional intermediate transmission and thereby improve space utilization of the headrest structure by integrally arranging the guide rail at the necessary first main body portion.

Drawings

The above and other features of the present invention will become apparent with reference to the accompanying drawings, in which,

fig. 1 shows a partially exploded view of a seat headrest structure in a first embodiment;

fig. 2 shows a further partially exploded view of the seat headrest structure in the first embodiment, however, with a fixed bracket of the fore-aft adjustment mechanism;

fig. 3 shows the seat headrest structure according to fig. 1 and 2 in an assembled state;

fig. 4 shows a partially exploded view of a seat headrest structure in a second embodiment;

fig. 5 shows a further partially exploded view of the seat headrest structure in a second embodiment;

figure 6 shows the seat headrest structure according to figures 4 and 5 in an assembled state;

fig. 7 shows a partially exploded view of a seat headrest structure in a third embodiment;

fig. 8 shows an enlarged illustration of detail a from fig. 7.

Detailed Description

It is easily understood that, according to the technical solution of the present invention, a plurality of alternative structural modes and implementation modes can be proposed by those skilled in the art without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present invention, and should not be considered as limiting or restricting the technical solutions of the present invention in their entirety or in any other way.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," "third," and the like are used for descriptive and descriptive purposes only and not for purposes of indication or implication as to the relative importance of the respective components.

Referring to fig. 1 to 3, there is shown a first embodiment of a seat headrest structure according to the present invention, wherein the seat headrest structure 100 has a headrest rod 110, a headrest main body 120, an up-down adjustment mechanism 130, and a forward-backward adjustment mechanism 140. The headrest rods 110 extend substantially vertically with one end thereof into the headrest body 120 and with the other end thereof into the seat back and fixedly connected thereto, the headrest rods 110 being stationary relative to the seat headrest structure 100 (also referred to simply as headrest structure hereinafter). The headrest body 120 is divided into a first body part 121 and a second body part 122, the first body part 121 being arranged closer to the user's head and neck in this embodiment, that is, it is frontally placed on the second body part 122. The first body part 121 and the second body part 122 are fixed in such a way that they can be moved not only together in the vertical direction but also the first body part 121 can be moved in the front-rear direction relative to the second body part 122. In this regard, the up-down adjustment mechanism 130 takes charge of the up-down movement of the headrest body 120 as a whole; the fore-aft adjustment mechanism 140 is responsible for movement, particularly translational movement, of the first body portion relative to the second body portion in the fore-aft direction.

The first body part 121 and the second body part 122 are dimensioned such that the first body part 121 externally surrounds the second body part 122, in particular the first body part 121 has a vertically extending side wall 1211 which surrounds the second body part 122, in particular the side faces thereof, or vice versa. For example, the side wall 1211 is optionally formed integrally with the first body part 121, and can be subjected to a material removal process and thus an openwork structure while ensuring the strength requirement thereof, in order to facilitate a lightweight design of the seat headrest structure.

Here, it should be noted first that the references to "up-down direction" and "vertical direction" relate to height adjustment of the headrest structure; the "front-back direction" is perpendicular to the up-down direction and extends in a horizontal plane, which relates to the movement of the headrest towards or away from the user's head and neck. Furthermore, the first body part is closer to the user's head and neck than the second body part, and a foam structure is also provided on the first body part for providing a more comfortable support for the user. The design of the first and second body parts can be modified accordingly or otherwise designed without departing from the basic concept. Finally, for the sake of clarity of the hierarchy, in the following, different embodiments of a component or an assembly are explained with the aid of the drawing only, the same being explained only with reference to the first exemplary embodiment shown in fig. 1 to 3 and provided with the same reference numerals.

The vertical adjustment mechanism 130 is designed here in the form of a spindle thread, which in particular comprises a rotationally driven drive motor 131 (for the sake of differentiation, also referred to as first drive motor), a first spindle 132 connected to its output in torque-transmitting fashion, and a first threaded socket (not visible in fig. 1) which is screwed to the spindle and is fixedly connected to the headrest body 120, in particular to the second body part 122 thereof, and into which the first spindle 132 extends. As shown in the drawing, the first drive motor 131 is arranged in a stationary manner on a support plate associated therewith (which is visible in fig. 7 and is arranged at the top of the headrest rod 110) which is fixedly connected, in particular welded, to the headrest rod 110. A first threaded seat is fixedly received in the second body part 122, in particular the second body part 122 has a projection integrally formed or fixed thereto, in which projection the threaded seat can be received or which is provided with an internal thread as a threaded seat. It is also possible that the first threaded seat is fixedly arranged in the second body part 122 as a separate component, for example by a welded connection or a threaded connection.

When adjusting the height of the seat headrest, the first driving motor 131 drives the first lead screw 132 to make a rotational movement, which is converted into a translational movement of the first screw seat in the vertical direction and drives the second body portion 122 fixedly connected with the first screw seat to move up and down together with the first body portion 121. In this process, the headrest rods 110 function as guides, that is, the headrest body 120 moves up and down as a whole guided by the headrest rods 110. The first drive motor 131 can be actuated by a central control unit of the vehicle or its own control unit, by controlling the angle of rotation of the first drive motor, the height of the headrest structure can be adjusted more precisely, in particular steplessly, and thus can be adapted better to users of different heights.

Of course, the up-down adjustment mechanism can also be realized in any other manner as long as it can move the headrest body up and down, for example, it can be simply configured as a lever system transmission mechanism. In addition, the arrangement of the up-down adjustment mechanism is also not limited to the above-explained manner, which is merely exemplary.

The forward-rearward adjustment mechanism 140 for urging the first body portion 121 away from or toward the second body portion 122 can include a forward-rearward drive 141 and a motion conversion device 142, wherein the forward-rearward drive 141 can provide a driving motion in a vertical direction and the motion conversion device is designed and arranged for converting the driving motion into a translational motion in a forward-rearward direction. The front and rear driving means 141 can be, but is not limited to, also configured in the manner of a screw thread, and in particular, it includes a second driving motor 1411 fixed at the second body portion 122, a second screw 1412 rotationally coupled with its output end, and a second screw seat (not visible in the drawings) threadedly engaged with the second screw, wherein the second screw seat is also assigned with a fixing bracket 1413. The fixed bracket 1413 is fixedly coupled to the second threaded socket and moves with the second threaded socket. As shown in the drawings, the second drive motor 1411 is fixedly arranged at the second body portion 122 by means of a support plate located therebelow, which support plate can be fixed at the second body portion 122 by means of a threaded fastener or a welded connection, see in particular fig. 1. The fastening bracket 1413 is also associated with a guide bar 1414 which is arranged in a fixed manner on the second body part 122, for example by means of a respective support plate being fixedly connected to the second body part 122 at the upper and lower ends.

Here, the motion converting means 142 of the back and forth adjustment mechanism includes a slider structure 1421 directly connected to the output end of the back and forth driving means 141, that is, the slider structure 1421 is disposed at a fixed bracket which is the end of the back and forth driving means, and particularly, symmetrically disposed at both ends of the fixed bracket 1413. Correspondingly, a guide rail 1422 is provided at the side wall 1211 of the first body part 121, and the first body part 121 is pushed to move in the front-rear direction by the sliding of the slider structure 1421 in the guide rail 1422. The guide track 1422 can be designed to have any desired shape, as long as it can achieve the above-described motion conversion. By integrally arranging the guide rail at the necessary first body portion, unnecessary intermediate transmission can be omitted and thereby space utilization of the headrest structure is improved.

Two different embodiments of the motion conversion device are explained in detail below, which are schematically illustrated in fig. 1 to 3 and fig. 4 to 6, respectively.

In the first embodiment shown in fig. 1 to 3, there is provided a slider structure 1421 configured as a pin, which is fixed to and protrudes from both ends of the fixing bracket 1413, respectively, and which in the assembled state protrudes beyond the guide rail 1422 and into the outside. In order to prevent the pin from slipping out of the guide rail, a flange is provided at its free end. In this embodiment, the guide track 1422 is designed as a guide slot and is oriented at an angle to the vertical. The second driving motor 1411 drives the second lead screw 1412 to rotate and drive the second screw seat in threaded fit with the second lead screw 1412 to move along the vertical direction together with the fixed bracket 1413. Next, the slider structure 1421 moving up and down slides in the inclined guide rail 1422 and thereby pushes the first body portion 121 to move in the front-rear direction.

Here, in order to provide a good guiding effect for the movement of the first body part 121, a guide member is provided at the second body part 122, particularly at a side thereof, for being received in and sliding in a guide groove of the first body part arranged in the front-rear direction. Here, for the sake of clarity of the hierarchy, no reference numerals are given thereto, and reference is made to fig. 2 accordingly.

In contrast, in the second exemplary embodiment shown in fig. 4 to 6, the slider structure 1421' is designed in the manner of a scissors mechanism. In particular, the slider structure 1421' comprises two guide bars, namely a first guide bar and a second guide bar, which are arranged angularly and relatively pivotable, for example, the two guide bars being hingedly connected at a central position. A first guide rod, one end of which is connected to an output end of the front and rear driving means 141, here, an end of the fixed bracket 1413, specifically, passes through a guide slot at a side wall of the second body portion 122 and moves in a vertical direction with the fixed bracket 1413; and is rotatably fixed at the other end thereof at the first body portion 121. In contrast, the second guide bar is rotatably fixed at the second body portion 122 with one end thereof and is received in the guide rail 1422' at the first body portion with the other end thereof. The guide groove associated with the first guide rod and the guide rail 1422' associated with the second guide rod can be oriented in the vertical direction.

The adjustment process in the front-rear direction of the seat headrest structure with this second embodiment is as follows: during forward adjustment, i.e. toward the user's head and neck, the second drive motor drives the fixed bracket in the vertical direction and the first guide rod in the guide groove associated therewith in the vertical direction, which first guide rod then pushes the first body part with its end forward. During this movement, the second guide rod moves together in the sense that its angle relative to the first guide rod increases.

The fastening bracket 1413 can optionally be assembled from a plurality of laminations, in particular sheet metal, for example in a simpler embodiment, by means of only two sheet metal parts forming a receiving cavity, in which the second threaded socket is fixedly fastened, in particular by welding. A guide bar 1414 is also sandwiched between the two metal plates with a gap so that the fixing bracket 1413 can move in the vertical direction along the guide bar 1414.

Alternatively, the fixed bracket 1413 may also be configured as an elongated solid body and internally threaded for mating with the second lead screw 1412. In this case, the fixing bracket 1413 can have a hollowed-out structure for reducing the overall mass of the headrest structure.

The first body part 121 and the second body part 122 are connected to be movable relative to each other, for example, they are connected by plugging. As shown in fig. 2, the second body part 122 has a plug slot 1221 which extends in the front-rear direction and is provided, for example, at a projecting step of the second body part 122; accordingly, a plug-in projection 1212, for example, a plug-in rod, which likewise extends in the front-rear direction and is accommodated movably in the front-rear direction in the plug-in slot 1221, is fastened to or integrally formed with the first body part 121. The combination of the plug-in slot 1221 and the plug-in projection 1212 not only serves for the connection fixation but also serves for guiding the relative movement of the first body part 121 with respect to the second body part 122. Furthermore, in order to prevent wear of the plug-in lug 1212, it is also possible to assign a corresponding bearing to it, which is fitted on the outer circumference of the plug-in lug and is intended to come into direct contact with the plug-in slot. Of course, the design can be reversed, that is, the insertion slot is located at the first main body portion, and the insertion protrusion is located at the second main body portion, which will not be described in detail.

Instead of the above-described plug connection, the first body part 121 and the second body part 122 can also be fixed in a sliding connection. As in the third embodiment shown in fig. 7 and 8, a slide protrusion 1213 "is provided on the top of the side wall of the first body portion 121, the slide protrusion 1213" being embedded in the side wall of the first body portion 121; correspondingly, a receiving track (not visible in the figures) for receiving and fixing the sliding projection 1213 ″ is provided at the second body part 122. The sliding projection 1213 ″ of the first body portion slides in the accommodation track when the headrest structure is adjusted in the front-rear direction. In order to reduce or to avoid to the greatest extent vibrations occurring during this movement and thereby influencing the user experience, the sliding projection of the first body part which is closer to the user's head and neck and in indirect contact therewith is assigned an elastic buffer 1214 ″ which is located below the sliding projection 1213 ″ and likewise embedded in the top of the side wall. The elastic buffer 1214 ″ can be made directly of an elastic material or it can also have a damping effect by means of a special structural design. For example, the elastic buffer 1214 ″ can optionally be designed as a hollow element and can have a wavy outer circumference, the vibrations transmitted to it being damped by deformation of its outer circumference.

Optionally, to further improve the problem of vibration noise during adjustment of the seat headrest structure, as in the first embodiment shown in fig. 1-3, spring elements 150 are provided between the first and second body portions 121, 122, each of which is fixed at one of the two body portions at one end. During the adjustment in the front-rear direction, the first body part 121 is pushed by the second body part 122 to move against the spring force of the spring element, during which movement the generated vibrations can be attenuated by the deformation of the spring element 150 and thus the user experience is improved.

In summary, under the premise of realizing the function of four-direction adjustment, especially four-direction electric adjustment, the seat headrest structure according to the present disclosure can obtain optimized space utilization by improving the arrangement manner of the corresponding adjusting mechanism. In an embodiment of the present invention, by arranging the guide rail obliquely at the first main body portion, the space utilization can be further improved. In another embodiment of the invention, a sufficient pushing action on the first body part can be ensured by constructing the slider structure in the manner of a scissors. In another embodiment of the invention, the problem of vibration noise of the seat headrest structure during adjustment can be improved by arranging the elastic element or the spring element at the corresponding position.

Finally, the invention also relates to a seat, in particular a car seat, having a seat headrest structure according to the invention as set forth above, which can have the features and advantages as set forth above, which are not repeated here.

It should be understood that all of the above preferred embodiments are exemplary and not restrictive, and that various modifications and changes in the specific embodiments described above, which may occur to those skilled in the art upon reading the teachings of the present invention, are intended to be within the scope of the appended claims.

Claims (10)

1. A seat headrest structure, comprising:

a headrest body including a first body portion and a second body portion, the first body portion including a vertically extending side wall;

a headrest rod protruding to the outside through the headrest body and fixedly variably disposed;

an up-down adjustment mechanism provided to drive the headrest main body to move in a vertical direction as a whole; and

a front-rear adjusting mechanism comprising a front-rear driving device for providing driving motion in a vertical direction and a motion converting device,

wherein the motion conversion means comprises a slider structure connected to an output of the forward and backward drive means and a guide track arranged on a side wall of the first body portion, the first body portion being urged to perform a translational motion in a forward and backward direction relative to the second body portion by sliding of the slider structure in the guide track, the forward and backward direction extending in a horizontal plane.

2. The seat headrest structure according to claim 1, wherein the forward-backward driving means includes a second driving motor fixed at a second main body portion, a lead screw rotatably connected to the second driving motor, a screw seat for screw-fitting with the lead screw, and a fixing bracket for fixing the screw seat, the slider structures being respectively fixed at ends of the fixing bracket, the slider structures being slidable in guide rails at the first main body portion.

3. The seat headrest structure according to claim 2, characterized in that the slider structure is a pin-like member, and the guide rail is arranged on the side wall obliquely with respect to the vertical direction.

4. The seat headrest structure according to claim 2, characterized in that the slider structure includes two guide bars angled and pivotably connected to each other, a first of the two guide bars being connected at one end thereof with an output end of a front-rear drive device and pivotably fixed at the other end thereof at a side wall of the first body portion; the second of the two guide bars is pivotably fixed at its one end at the second body portion and is accommodated at its other end in the guide rail.

5. The seat headrest structure according to any one of claims 1 to 4, wherein the first body portion is plug-connected with the second body portion, a plug slot is provided at one of the first body portion and the second body portion, and correspondingly, a plug protrusion is provided at the other of the first body portion and the second body portion, the plug protrusion being slidably movable in the plug slot in the front-rear direction.

6. The seat headrest structure according to any one of claims 1 to 4, wherein the side wall is integrally formed with the first body portion, and an hollowed-out structure is provided on the side wall.

7. The seat headrest structure according to claim 6, wherein a slide protrusion is disposed at a top portion of the side wall, an elastic cushion is attached to the slide protrusion, and a receiving rail for receiving the slide protrusion is provided at the second main body portion, respectively, the slide protrusion being slidably movable in the front-rear direction in the receiving rail.

8. The seat headrest structure according to claim 7, wherein the elastic buffer member is configured as a hollow member and has an outer peripheral edge in a wave shape.

9. The seat headrest structure according to any one of claims 1 to 4, wherein a spring element is fixed between the first and second body portions for reducing vibration generated when the first body portion moves relative to the second body portion.

10. A seat comprising a seat headrest structure according to any one of claims 1 to 9.

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