KR102419989B1 - Head rest assembly and biasing module used therefor - Google Patents

Abstract

The present invention, a stay having a pair of base frames; A main plate having a first width in a front-rear direction intersecting a plane formed by the pair of base frames, is connected to both ends of the main plate, surrounds each of the pair of base frames, and the first along the front-rear direction a mounting base having a pair of clamping portions having a second width greater than the width; a movable body disposed to be movable relative to the main plate in the front-rear direction; and a front-rear locking unit configured to lock the movable body at a position along the front-rear direction.

Description

HEAD REST ASSEMBLY AND BIASING MODULE USED THEREFOR}

The present invention relates to a headrest assembly for use in automobiles.

In general, a head rest for a vehicle is installed at an upper end of a seat, and is used as a headrest by lifting and rotating according to the height of the occupant's head. The headrest also supports the occupant's head in the event of a rear-end collision, preventing neck injuries.

Recently, in addition to a function for preventing neck injuries and a headrest, a headrest is also used as an object to which a monitor for viewing an image is attached to the back of the headrest. In this case, the headrest is manufactured so that the rear occupant can linearly move it in the front/rear direction to watch the video in the vehicle.

However, the configuration for linear motion of the headrest has a large number of parts, so the structure is complicated and the manufacturing process is also difficult. In addition, the headrest has a limit in slimming by adopting such a configuration. Considering the reality that the interior space of a car is becoming a work space or a rest space as the era of autonomous vehicles is in full swing, slimming the seat and headrest, which occupies a large volume in the interior space, is also an urgent requirement.

It is an object of the present invention to provide a headrest assembly that provides a function of adjusting the position of a headrest, while being slimmer than before, to meet the maximization of indoor space required in the era of autonomous vehicles.

Another object of the present invention is to provide a headrest assembly that can promote convenience of assembling between components for slimming and simplification of an assembly process.

A headrest assembly according to an aspect of the present invention for realizing the above object includes: a stay having a pair of base frames; A main plate having a first width in a front-rear direction intersecting a plane formed by the pair of base frames, is connected to both ends of the main plate, surrounds each of the pair of base frames, and the first along the front-rear direction a mounting base having a pair of clamping portions having a second width greater than the width; a movable body disposed to be movable relative to the main plate in the front-rear direction; and a front-back locking unit configured to lock the movable body at a position along the front-rear direction, wherein the front-back locking unit includes a plurality of first locking elements arranged along the front-rear direction, the movable body a first front-back engaging member disposed to move along the front-rear direction together with; a second front and rear locking member having a second locking element formed to engage one of the plurality of first locking elements and having a main surface facing the main surface of the main plate; and moving one of the first front-back locking member and the second front-back locking member in a direction away from the other, so that the locking state between the first locking element and the second locking element is switched to the released state. wherein at least one of the pair of clamping parts has an open end that is open toward a direction away from the other of the pair of clamping parts, and the base frame is moved through the open end. It may be allowed to be accommodated in the clamping part.

A headrest assembly according to another aspect of the present invention includes a stay having a pair of base frames; A main plate having a first width in a front-rear direction intersecting a plane formed by the pair of base frames, is connected to both ends of the main plate, surrounds each of the pair of base frames, and the first along the front-rear direction a mounting base having a pair of clamping portions having a second width greater than the width; and a movable body having a guide pin arranged in the front-rear direction so as to penetrate the clamping part, the moving body being guided along the front-rear direction by the guide pin and arranged to be movable relative to the main plate, at least one of the pair of clamping portions has an open end open toward a direction away from the other of the pair of clamping portions, through the open end allowing the base frame to be received in the clamping portion, and Each of the pair of clamping parts may have a guide hole through which the guide pin is inserted, and the guide hole may guide the guide pin to move in the front-rear direction.

A headrest assembly according to another aspect of the present invention includes a stay having a pair of base frames; A main plate having a first width in a front-rear direction intersecting a plane formed by the pair of base frames, is connected to both ends of the main plate, surrounds each of the pair of base frames, and the first along the front-rear direction a mounting base having a pair of clamping portions having a second width greater than the width; and a movable body having a guide pin arranged in the front-rear direction so as to penetrate the clamping part, the moving body being guided along the front-rear direction by the guide pin and arranged to be movable relative to the main plate, At least one of the pair of clamping parts includes a cover block detachably coupled to the main plate and enclosing an outer circumferential surface of the base frame together with the main plate, wherein the cover block and the main plate include the guide pins. A guide hole to be inserted therethrough may be provided, and the guide hole may guide movement of the guide pin in the front-rear direction.

According to another aspect of the present invention, there is provided a biasing module for a headrest assembly, comprising: a biasing module that provides a biasing force for locking operation of a front and rear locking unit in the headrest assembly, comprising: a biasing body that is a leaf spring; a first support part bent from a central portion of the deflection body and extending to support the manipulation knob; and a second support portion bent and extended in a direction different from the first support portion from the central portion of the deflection body to support a base frame, wherein at least one of the first support portion and the second support portion adjusts its elastic force It may include an opening for

A deflection module for a headrest assembly according to another aspect of the present invention includes: a stay having a pair of base frames; A main plate having a first width in a front-rear direction intersecting a plane formed by the pair of base frames, is connected to both ends of the main plate, surrounds each of the pair of base frames, and the first along the front-rear direction a mounting base having a pair of clamping portions having a second width greater than the width; and a movable body provided with a guide pin arranged in the front-rear direction to penetrate the clamping part, the movable body being guided along the front-rear direction by the guide pin and arranged to be movable relative to the main plate, The body may include: a first body having a first coupling region; and a second body having a second bonding region corresponding to the first bonding region, wherein the first bonding region and the second bonding region are coupled by at least one of thermocompression bonding, bonding, and ultrasonic bonding. can

According to the headrest assembly according to the present invention configured as described above, in a state in which the mounting base is coupled to the stay and the movable body is arranged to move in the front-rear direction with respect to the mounting base, the front-back locking unit moves the movable body in the front-rear direction. For locking in a position, the front-back locking unit has a first front-back locking member having a plurality of first locking elements along a fore-and-aft direction and a second locking element engaged with one of the plurality of first locking elements, and facing the mounting base and a second front and rear locking member having a main surface that Inverted, allowing the headrest to be positioned and locked in the fore-and-aft direction while minimizing the width of the headrest along the fore-and-aft direction. This is significant as it responds to the maximization of interior space required in the era of autonomous vehicles.

Furthermore, each of the pair of clamping parts constituting the mounting base is formed to surround each of the base frames of the pair of stays, and one of the pair of clamping parts has an open end open toward a direction away from the other, The open end allows the base frame to be accommodated in the clamping part by a simple assembly process.

In addition, the first body and the second body constituting the movable body each have a first coupling area or a second coupling area, and the first coupling area and the second coupling area are coupled by at least one of thermocompression bonding, bonding, and ultrasonic bonding. Accordingly, in the assembly process of the moving body, it is not necessary to use a fastening piece such as a bolt, so that the assembly process can be simplified.

1 is an assembled perspective view of a headrest assembly 100 according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the headrest assembly 100 of FIG. 1 .
3 is a perspective view showing only a main part of the headrest assembly 100 in FIG. 2 .
FIG. 4 is a schematic conceptual diagram for explaining a coupling relationship between main parts of the headrest assembly 100 of FIG. 3 .
5 is a perspective view of a main part showing a case in which the front and rear locking units 160 are in a locked state.
6 is a perspective view of a main part showing a coupling relationship between the main plate 120 and the front and rear locking units 160 of FIG. 5 .
7 is a perspective view of a main part showing a case in which the front and rear locking unit 160 of FIG. 5 is in an unlocked state.
FIG. 8 is a cutaway perspective view taken along line VIII-VIII for the headrest assembly 100 of FIG. 1 .
FIG. 9 is a cutaway perspective view taken along line IX - IX of the headrest assembly 100 of FIG. 1 .
10 is a perspective view of the elastic support member 171 of FIG. 2 .
11 is a cross-sectional view showing a mounting base according to another modified example of the present invention.
12 is a perspective view showing a mounting base according to another modified example of the present invention.
13 is a perspective view showing a mounting base according to another modified example of the present invention.

Hereinafter, a headrest assembly according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present specification, the same and similar reference numerals are assigned to the same and similar components even in different embodiments, and the description is replaced with the first description.

1 is an assembled perspective view of a headrest assembly 100 according to an embodiment of the present invention.

Referring to this drawing, the headrest assembly 100 forms most of the mechanical configuration of the headrest. After the cushion is added to this headrest assembly 100, if the outer skin is finally covered, it becomes a headrest. This headrest is positioned above the seat back (not shown) of the vehicle, and is configured to support the head of the occupant. The headrest may have an adjustable position along the front and rear directions (F and B). The headrest may also be one whose position is adjusted in the elevating direction (V) with respect to the seat back.

The headrest assembly 100 specifically includes a stay 110 and a moving body 150 . Further, the headrest assembly 100, specifically, the front and rear locking unit 160 for adjusting the position of the moving body 150 and the lifting and lowering locking unit 180 (refer to FIG. 2 above), which is a component of the release operation member 168, is More may be provided.

The stay 110 includes a base frame 111 coupled to the seatback. The base frame 111 may be provided as a pair that is substantially parallel to each other, and may be disposed along the elevating direction (V). An upper portion of the base frame 111 may be located inside the movable body 150 .

The moving body 150 is configured to move relative to the stay 110 in the front-rear direction (F and B) while a part of the stay 110 is built-in. Here, the front and rear directions F and B may be defined as directions crossing the plane formed by the pair of base frames 111 . Thereby, the front-back directions F and B are the directions intersecting the raising/lowering direction V, and more specifically, the direction perpendicular|vertical. The movable body 150 is wrapped with a cushion and finally finished by the outer skin, and serves to support the user's head.

The release operation member 168 is configured to be in a state in which the position of the movable body 150 can be adjusted by being pressed by the user. In a state in which the release operation member 168 is pressed, the movable body 150 may be operated to be moved in the forward and backward directions (F and B) or the elevation direction (V).

A detailed configuration of the above headrest assembly 100 will be described with reference to FIGS. 2 to 4 .

FIG. 2 is an exploded perspective view of the headrest assembly 100 of FIG. 1 , FIG. 3 is a perspective view showing only a main part of the headrest assembly 100 in FIG. 2 , and FIG. 4 is the headrest assembly 100 of FIG. 3 . ) is a simplified conceptual diagram for explaining the coupling relationship between the main parts.

Referring to these drawings, the headrest assembly 100, in addition to the aforementioned stay 110 and the moving body 150, the main plate 120, the coupling unit 130, the front and rear locking unit 160, and The lift lock unit 180 may be further included.

The stay 110 may have a pair of base frames 111 . A pair of base frames 111 may be arranged side by side. The pair of base frames 111 are connected by a connecting plate 115, and the connecting plate 115 may be arranged along the left and right directions (L and R) that intersect the extending direction of the base frame 111. have. Here, the left and right directions L and R may be directions intersecting the front and rear directions F and B and the elevating direction V, specifically, vertical directions. Furthermore, the connection plate 115 has a plate shape, and may have a smaller width (thin thickness) than the base frame 111 along the front-rear directions (F and B). Specifically, the connection plate 115 may have a central portion 116 biased toward one of both ends of the base frame 111 along the front-rear directions (F and B). Furthermore, a peripheral portion 117 bent and extended therefrom may be formed at an edge of the central portion 116 . The peripheral portion 117 may be attached to opposite inner surfaces of the pair of base frames 111 . Specifically, the peripheral portion 117 may be provided as a pair and welded to each of the pair of base frames 111 .

The main plate 120 may have a size and shape corresponding to the area between the stay 110 , specifically, the pair of base frames 111 . Accordingly, the main plate 120 may have a generally rectangular shape. The main plate 120 has a first width W ₁ along the front and rear directions F and B. The first width W ₁ may be smaller than a diameter of the stay 110 , for example, the base frame 111 . The main plate 120 may be formed by pressing a metal material, and in this case, it has sufficient rigidity to support the front and rear locking units 160 and the like despite the first width W ₁ .

The main plate 120 is configured for installation of the front and rear locking units 160 and the like. The main plate 120 may have a substantially rectangular plate shape corresponding to the space between the pair of base frames 111 . The opening 121 may be cut-out in the main plate 120 . The opening 121 may be formed in the center of the main plate 120 and all perimeters are blocked, or, alternatively, at least a portion of the opening 121 may be open to the outside.

The coupling unit 130 is configured to couple the main plate 120 to the stay 110 , specifically, the base frame 111 . To this end, the coupling unit 130 may be installed on at least one of both ends of the main plate 120 . When the coupling unit 130 is provided as a pair installed at both ends of the main plate 120 , the pair may be spaced apart from each other. This spacing of the coupling unit 130 is sufficient to allow the first front and rear locking members 161 to be described later disposed therebetween to move along the front and rear directions F and B without penetrating them.

The coupling unit 130 may be specifically implemented as a clamping part enclosing the base frame 111 . The clamping part is provided as a pair corresponding to each of the pair of base frames 111 . The clamping unit may have a first corresponding area 131 and a second corresponding area 132 disposed to correspond to each other in relation to the stay 110 . The first corresponding region 131 and the second corresponding region 132 may be disposed to face each other with respect to the base frame 111 . Here, the first corresponding region 131 and the second corresponding region 132 are illustrated as being parallel to each other, but may be arranged to be inclined to each other. The first corresponding area 131 and the second corresponding area 132 are connected to each other by the connection area 133 . The connection area 133 is illustrated as a curved shape. The connection area 133 may be implemented not as a curved surface, but as a flat surface or a curved surface. The coupling unit 130 may be integrally formed with the main plate 120 by a single member. This coupling unit 130 may be collectively referred to as a mounting base together with the main plate 120 hereinafter.

At least one of the first corresponding area 131 and the second corresponding area 132 may be disposed to contact the stay 110 . Thereby, the pitching of the main plate 120 with respect to the stay 110 is limited, and stable coupling and relative movement therebetween can be made|formed.

The coupling unit 130 may further include a support block 138 in addition to the above. The support block 138 may be inserted into a space defined by the first corresponding region 131 , the second corresponding region 132 , and the connection region 133 to prevent a gap between them and the base frame 111 . . The support block 138 may be formed of a material different from the first corresponding region 131 and the like, for example, a synthetic resin having superior lubricity than them. When the support block 138 is provided, at least one of the first corresponding area 131 and the second corresponding area 132 may contact the stay 110 through the support block 138 .

The coupling unit 130 has a second width (W ₂ ) along the front and rear directions (F and B). The second width W ₂ is a width defined by the first corresponding region 131 and the second corresponding region 132 , and may correspond to a width between outer surfaces of the first corresponding region 131 and the second corresponding region 132 . The second width W ₂ is greater than the first width W ₁ of the main plate 120 .

The coupling unit 130 may further have a first guide hole 135 and further a second guide hole 136 . The first guide hole 135 and the second guide hole 136 may be formed to pass through the clamping part. The first guide hole 135 and the second guide hole 136 may be formed to correspond to each other. Unlike the above, the second guide hole 136 may not be provided, but only the first guide hole 135 may be provided. In addition, the coupling unit 130 may be slidably coupled along the elevation direction V with respect to the base frame 111 . The first guide hole 135 and/or the second guide hole 136 may be disposed outside each of the pair of base frames 111 rather than between them. In this case, the first corresponding region 131 and the second corresponding region 132 should extend outward more than in the present embodiment.

Open ends 137a and 137b open laterally from the lower end to the upper end of the clamping part may be formed. The open ends 137a and 137b may be divided into a first open end 137a and a second open end 137b. If the first open end 137a corresponds to one of the pair of clamping portions, the second open end 137b corresponds to the other one of the pair of clamping portions. Here, the first open end 137a and the second open end 137b may be opened in opposite directions. Specifically, when the first open end 137a is opened toward the left direction L, the second open end 137b may open toward the right direction R. In this case, when inserting the base frame 111 into the clamping part, the mounting base is erected in the elevating direction (V) and inserted between the pair of base frames 111, and then in the front-rear direction (F and B) Rotate him around an axis along Thereby, it is possible to couple the mounting base to the stay 110 in a simple manner despite the structure of the clamping portion.

The movable body 150 may have a guide pin 151 and bodies 153 and 156 .

The guide pins 151 are arranged along the front and rear directions F and B, and are formed in the first guide hole 135 (and the second guide hole 136 ), and further in the receiving groove (not shown) of the support block 138 . It can be slidably inserted. The guide pin 151 may be slidably disposed along the front and rear directions F and B while in contact with the base frame 111 . Corresponding to the guide pin 151 , a first support protrusion 152a may be provided on a first body 153 , which will be described later, and a second support protrusion 152b may be provided on the second body 156 . The first support protrusion 152a and the second support protrusion 152b may extend toward and contact each other. They are inserted into the hollow portion of the guide pin 151 to support the guide pin (151).

The bodies 153 and 156 are parts surrounding the main plate 120 , the coupling unit 130 , the front and rear locking units 160 , and the like. The bodies 153 and 156 are specifically divided into a first body 153 and a second body 156 , and their coupling regions 159a and 159b may be bonded to each other. The bonding regions 159a and 159b are formed in a concave shape, and thermocompression bonding, bonding, and ultrasonic bonding may be performed on the corresponding portions. This enables a fine coupling between the first body 153 and the second body 156, and simplifies the coupling process by not requiring a separate bolt or the like. The first body 153 may be provided with an installation part 154 in which the release operation member 168 is installed. In addition, a first protrusion 155 may be formed on the first body 153 , which is for installation of a first front and rear locking member 161 to be described later. A second protrusion 157 corresponding to the first protrusion 155 may be formed on the second body 156 . Further, the second body 156 is formed with a concave region 158 that is recessed when viewed in the forward direction (F). The concave region 158 may be formed in the central portion of the second body 156 along the left and right directions L and R. In addition, the concave region 158 may be formed to extend from the lower end to the upper end of the second body 156 in the elevating direction (V). The concave region 158 is a region corresponding to the user's head, in which the cushion may be disposed thicker. This concave area 158 will form a convex portion when viewed along the rear direction B.

The front-rear locking unit 160 is configured to lock the movable body 150 to a position moved along the front-rear directions (F and B). The front and rear locking units 160 may be installed with respect to the main plate 120 and occupy a mounting space by ΔW described above. The front-back locking unit 160 includes a first front-back locking member 161 , a second front-back locking member 165 , and a release operation member 168 , and may further include an elastic support member 171 .

The first front and rear locking member 161 is coupled to the moving body 150 and moves together with the moving body 150 along the front and rear directions F and B. The first front-back locking member 161 is a member extending along the front-rear directions F and B, and is also referred to as a base rod. Concavities and convexities may be formed on the outer peripheral surface of the base rod 161 . A plurality of front and rear positioning grooves 163 are concavely formed by the unevenness, which may also be referred to as a first locking element. The front and rear positioning grooves 163 may be circular grooves formed along the circumferential direction of the base rod 161 . Alternatively, the front and rear positioning grooves 163 may be grooves formed only in some angular sections along the circumferential direction. The base rod 161 is disposed to penetrate the opening 121 of the main plate 120 .

The second front-back locking member 165 corresponds to the first front-back locking member 161, and is configured to implement a locking state and a release state together with it. The second front and rear locking member 165 is connected to the release operation member 168 , and may be moved from the locking state to the release state by a user's manipulation of the release operation member 168 . Structurally, the second front and rear locking member 165 may be a moving member having a main surface facing the main surface of the main plate 120 . The moving member 165 may have a smaller width (thin thickness) than the base frame 111 along the front-rear directions F and B. A specific shape of the moving member 165 may be a moving plate having a plane (a second plane) parallel to a plane (a first plane) formed by the main plate 120 . The movable plate 165 may be slidably installed in a face-to-face correspondence with the main plate 120 . During the sliding, the moving plate 165 may move along the left direction L, which is the separation direction. An opening 166 is formed in the moving plate 165 , and the base rod 161 may be inserted thereinto. An edge defining the opening 166 may function as the second locking element 167 in that it engages with one of the plurality of front and rear positioning grooves 163 to implement the locking state. The edge faces the base rod 161 and is caught in the front and rear positioning grooves 163 , and may be referred to as a locking edge. The engaging edge is integrated with the moving plate 165 , and the moving plate 165 is parallel to the main plate 120 and occupies only a minimum space along the front and rear directions F and B. This provides a great meaning to the slimming of the headrest assembly 100 .

The release operation member 168 is configured to be operable by pressing along the left and right directions L and R, specifically, the left direction L. The release operation member 168 is positioned outside one of the pair of base frames 111 . The release operation member 168 may be installed on the installation part 154 of the movable body 150 and exposed to the outside. Specifically, the release operation member 168 may have a connection portion 169 and an operation knob 170 . The connecting portion 169 is coupled to the moving plate 165 and supported by the elastic support member 171 . The elastic support member 171 elastically biases the connection part 169 in the right direction R, which is a restoration direction opposite to the left direction L, which is the separation direction. The operation knob 170 is installed to be operated by pressing along the separation direction with respect to the moving body 150 . The operation knob 170 has a size in contact with the connection part 169 within the entire movement section of the moving body 150 in the front and rear directions (F and B).

The elastic support member 171 is configured to elastically support the release operation member 168 with respect to one base frame 111 . To that end, the elastic support member 171 is disposed between the release operation member 168 and the one base frame 111 . The elastic support member 171 may be supported by the base frame 111 while physically supporting the manipulation knob 170 . The elastic support member 171 may be configured as a leaf spring, as illustrated.

The elevating locking unit 180 is configured to lock the main plate 120 and the coupling unit 130 to a position moved along the elevating direction V. The elevating locking unit 180 may have a first elevating engaging element 181 and a second elevating engaging element 185 corresponding thereto. The first elevating locking element 181 may be a plurality of elevating positioning grooves arranged along the elevating direction V on the rod of the base frame 111 . The second lifting and lowering locking element 185 may be a locking protrusion formed on the moving member, specifically, the moving plate 165 . The second lifting and lowering locking element 185 may also be moved in the left direction L together with the moving plate 165 by pressing the release operation member 168 . In that case, the locking state between the first lifting and lowering locking element 181 and the second lifting and lowering locking element 185 is switched to the released state.

According to this configuration, the user may want to adjust the position of the movable body 150 by pressing the release operation member 168 in order to optimize the size of the user's body.

First, when the user wants to operate the position in the front and rear directions (F and B), the front and rear locking unit 160 is released from the jammed state by a pressing operation along the left direction (L) with respect to the release operation member 168 . When switched to the state, the guide pin 151 is inserted into the first guide hole 135 (and the second guide hole 136), and the bodies 153 and 156 move forward and backward by the user's force (F and B) can be moved along. After the body (153 and 156) stops at the position intended by the user along the front-rear directions (F and B), when the pressing operation on the release operation member (168) is released, the second by the restoring force of the elastic support member (171) The front and rear locking member 165 moves in the right direction (R) so that the front and rear locking unit 160 is switched back to the locking state to lock the movable body 150 at the corresponding position. During this operation, the main plate 120 and the coupling unit 130 are not moved along the front-rear directions (F and B).

Next, when the user wants to manipulate the position of the lifting direction V, when the lifting lock unit 180 is switched from the locked state to the released state by a pressing operation on the release operation member 168, the coupling unit ( In a state where 130 is slidably clamping the base frame 111 , the main plate 120 , the coupling unit 130 , and the moving body 150 may be moved along the lifting direction V by the user's force. . After the main plate 120 and the coupling unit 130 stop at the position intended by the user along the elevating direction V, when the pressing operation on the release operation member 168 is released, the second front and rear locking member 165 is As it moves in the right direction (R), the second lifting locking element 185 engages with the first lifting and lowering locking element 181, so that the lifting locking unit 180 is switched to a locking state again, and the main plate 120, etc. make it locked

As described above, even when the front-rear locking unit 160 and the elevating locking unit 180 are employed, they are installed by occupying the mounting space by ΔW, so that the front-rear direction (F and B) of the headrest assembly 100 is The extent to which the width is increased is not large.

The specific configuration of the front/rear locking unit 160 and the lifting/lowering locking unit 180 in the above will be described with reference to FIGS. 5 to 7 .

5 is a perspective view of the main part showing the case where the front-back locking unit 160 is in a locked state, and FIG. 6 is a perspective view of the principal part showing the coupling relationship between the main plate 120 and the front-back locking unit 160 of FIG. 7 is a perspective view of a main part showing a case in which the front and rear locking unit 160 of FIG. 5 is in an unlocked state.

First, referring to FIG. 5 , the moving plate 165 is movably mounted with respect to the main plate 120 . Specifically, the main plate 120 has an accommodation space 123 to accommodate the moving plate 165 . The accommodation space 123 may be a portion formed by being concavely concave along the forward direction F compared to the remaining space of the main plate 120 . The accommodating space 123 may have a size that allows the movable plate 165 to slide in the left and right directions (L and R), but does not allow it to move in the elevation direction (V).

In a state in which the moving plate 165 is deflected in the right direction (R) by the elastic support member 171 , the engaging edge 167 of the moving plate 165 is in the front and rear positioning grooves 163 of the base rod 161 . is inserted Thereby, the base rod 161 is caught by the moving plate 165, and cannot move along the front-back directions F and B. This state is the jammed state mentioned earlier.

This locking state is achieved in the same manner in the first lifting and lowering locking element 181 and the second lifting and lowering locking element 185 in the lifting locking unit 180 .

Referring to FIG. 6 , the moving plate 165 is connected to the connection part 169 in the locked state (and the released state). In order to move the connection part 169 along the left and right directions L and R, the opening 121 may have an extended opening 121a that communicates with the outside along the left and right directions L and R.

An opening 127 may also be formed in the main plate 120 and the coupling unit 130 . The free end of the moving plate 165 may be inserted into the opening 127 . The opening 127 allows movement of the moving plate 165 in the left and right directions L and R.

Referring to FIG. 7 , while the elastic support member 171 is compressed while the moving plate 165 is moved in the left direction (L), the engaging edge 167 of the moving plate 165 is the base rod 161 . It is out of the front and rear positioning grooves (163). Thereby, the base rod 161 can move along the front-back directions F and B without being constrained by the moving plate 165 . This state is the previously mentioned release state.

This release state is also achieved in the first lifting locking element 181 and the second lifting and lowering locking element 185 in the lifting locking unit 180 in the same manner.

FIG. 8 is a cutaway perspective view taken along line VIII-VIII for the headrest assembly 100 of FIG. 1 .

Referring to this drawing, the base rod 161 may be coupled to the first protrusion 155 and the second protrusion 157 . To this end, the base rod 161 may have a pipe shape having a hollow portion 162 . The first protrusion 155 and the second protrusion 157 may be inserted into the hollow part 162 . The first protrusion 155 and the second protrusion 157 may be tapered toward the free end by injection molding, and the hollow portion 162 may have a cross-sectional change corresponding thereto.

The first protrusion 155 and the second protrusion 157 are disposed to face each other. Here, the facing state includes a case in which they are in contact with each other or are disposed quite close enough to be in contact with each other. With such an arrangement, when an impact is applied to the headrest assembly 100 , the first protrusion 155 or the second protrusion 157 does not apply an impact only to the bodies 153 and 156 of the movable body 150 and they The liver can absorb the shock.

In the base rod 161, the protruding portion 164 defining the front and rear positioning grooves 163 is defined by two sides 164a and 164b. Here, one side 164a forms an acute angle with respect to the front and rear directions F and B, and the other side 164b forms an almost right angle. As a result, one side 164a of the engaging edge 167 (refer to FIG. 5 ) of the moving plate 165 can ride over, but the other side 164b cannot ride over. Thereby, the movable body 150 can be moved only by pressing the release operation member 168 in one of the forward and backward directions F and B, but there is no need to do so in the other direction. This structure of the two sides 164a and 164b may also be applied to the protruding portion forming the first lifting and lowering locking element 181 (refer to FIG. 3 ).

Furthermore, the concave region 158 is also configured to protrude toward the main plate 120, but the protruding portion is a pair of coupling units ( 130) and the first space defined by the main plate 120 (S ₁ , see FIG. 3) has a size to be inserted. The portion protruding by the concave region 158 may also be inserted into the second space ( S ₂ , see FIG. 3 ) defined by the pair of base frames 111 and the connection plate 115 . The above spaces S ₁ and S ₂ provide a space in which the movable body 150 can move as much as possible along the forward direction F when the moving body 150 moves along the forward and backward directions F and B. Accordingly, the width of the movable body 150 can be reduced, and finally, the slimming of the headrest assembly 100 can be further strengthened.

FIG. 9 is a cutaway perspective view taken along line IX - IX of the headrest assembly 100 of FIG. 1 .

Referring to this drawing, the first support protrusion 152a and the second support protrusion 152b are inserted into the hollow portion 151a of the guide pin 151 .

Here, the first support protrusion 152a and the second support protrusion 152b may have a tapered shape such that the cross-sectional area becomes smaller toward the free end. Correspondingly, the hollow portion 151a of the guide pin 151 may also have a reduced cross-sectional area.

Further, the first bonding region 159a and the second bonding region 159b are formed to be in contact with each other and to be attached to each other by ultrasonic welding or the like.

The above elastic support member 171 will be described with reference to FIG. 10 . 10 is a perspective view of the elastic support member 171 of FIG. 2 .

Referring to this figure, the elastic support member 171 is a configuration that provides a biasing force for the locking operation of the front and rear locking unit 160 , and may be referred to as a biasing module.

The deflection module may have a deflection body 171a, a first support portion 171b, and a second support portion 171c. The biasing body 171a may have a leaf spring structure. The first support portion 171b is a portion bent and extended from the central portion of the deflection body 171a. The first support portions 171b may extend from both sides of the central portion, respectively, and may be provided as a pair. Furthermore, the first support portion 171b and the deflection body 171a may have an overall bow shape. The pair of first support portions 171b may support the manipulation knob 170 . The second support portion 171c is configured to extend bent from the central portion of the deflection body 171a. The second support part 171c may be supported by the base frame 111 .

Openings 171b ′ and 171c ′ may be formed in the first support part 171b and the second support part 171c . The openings 171b' and 171c' are formed to adjust the elastic force of the first support part 171b or the second support part 171c. They may be formed at a portion where the first support part 171b or the second support part 171c is bent.

Now, other forms of the above-described mounting base will be described with reference to FIGS. 11 to 13 .

First, FIG. 11 is a cross-sectional view showing a mounting base according to another modified example of the present invention. Referring to this drawing, the main plate 120A of the mounting base is substantially the same as that of the previous embodiment, but the pair of clamping parts 130A is different from that of the previous embodiment.

Specifically, in the pair of clamping parts 130A, the first open end 137a ′ and the second open end 137b ′ may be opened in the same direction as each other, for example, the right direction R.

According to this configuration, the mounting base is assembled with respect to the base frame 111, after moving the main plate 120A in the rear direction (B) to make contact with the left base frame 111 in the drawing, then again in the right direction ( R) can be achieved by moving This also ensures easy assembly between the mounting base and the base frame 111 .

Next, FIG. 12 is a perspective view showing a mounting base according to another modified example of the present invention.

Referring to this drawing, the mounting base may be configured by coupling a first plate 120a and a second plate 120b. In this case, the central region of the first plate 120a and the second plate 120b constitutes the main plate 120B corresponding to the main plate 120 of the previous embodiment, and both edge regions thereof are the coupling unit of the previous embodiment. A coupling unit 130B corresponding to 130 may be configured.

Specifically, the first plate 120a may have a flat plate shape as a whole. Both edge regions thereof may be the first corresponding regions 131 ′ of the coupling unit 130B. A first guide hole 135' is formed in the first corresponding area 131'.

In contrast, the central portion of the second plate 120b has a flat plate shape, but both edge regions thereof may be bent one or more times. Thereby, the bent portion constitutes the second corresponding region 132 ′ and the connecting region 133 ′ of the coupling unit 130B. A second guide hole 136 ′ corresponding to the first guide hole 135 ′ is formed in the second corresponding region 132 ′.

This mounting base also achieves the same function as the mounting base according to the first embodiment, while more easily restricting each of the first plate 120a and the second plate 120b and then combining them to manufacture the mounting base. .

Finally, FIG. 13 is a perspective view showing a mounting base according to another modified example of the present invention.

Referring to this figure, the mounting base may be configured as a combination of the main plate 120 ″ and the cover block 130 ″.

The main plate 120" may have a flat plate shape as a whole. An opening 121" is formed in a central portion thereof, and a first guide hole 135" as a part of the coupling unit 130C is opened in both edge regions. can be

The cover blocks 130 ″ are provided as a pair and may be respectively coupled to both edge regions of the main plate 120 ″. The cover block 130" forms an open hole 137" for accommodating the base frame 111 together with the main plate 120". The open hole 137" is formed along the elevating direction V. .

Also, when the first guide hole 135 ″ is formed in the edge region of the main plate 120 ″, a corresponding second guide hole 136 ″ may be formed in the cover block 130 ″.

According to this configuration, after arranging the main plate 120 ″ on one side of the stay 100 (see FIG. 2), a pair of cover blocks 130 ″ are arranged on the other side of the stay 100, the main The plate 120" and the cover block 130" may be combined. In that case, the base frame 111 is accommodated in the open hole 137" formed by the main plate 120" and the cover block 130", and the mounting base is coupled to the stay 100 in a simple manner.

The headrest assembly as described above is not limited to the configuration and operation method of the above-described embodiments. The above embodiments may be configured so that various modifications may be made by selectively combining all or part of each of the embodiments.

100: headrest assembly 110: stay
120: main plate 130, 230: combination unit
150: moving body 160: front and rear locking unit
180: lift lock unit

Claims (23)

a stay having a pair of base frames; A main plate having a first width along a front-rear direction crossing a plane formed by the pair of base frames, is connected to both ends of the main plate, surrounds each of the pair of base frames, and the first width along the front-rear direction a mounting base having a pair of clamping portions having a second width greater than the width; a movable body disposed to be movable relative to the main plate in the front-rear direction; and a front-back locking unit configured to lock the movable body at a position along the front-rear direction,
The front-back locking unit may include: a first front-back locking member having a plurality of first locking elements arranged along the front-rear direction and arranged to move along the front-rear direction together with the movable body; a second front and rear locking member having a second locking element formed to engage one of the plurality of first locking elements and having a main surface facing the main surface of the main plate; and moving one of the first front-back locking member and the second front-back locking member in a direction away from the other, so that the locking state between the first locking element and the second locking element is switched to the released state. and a release operation member that
Each of the pair of clamping parts has an open end open laterally from the bottom to the top to receive the base frame,
and an open end of at least one of the pair of clamping parts is open toward a direction away from the other of the pair of clamping parts.
According to claim 1,
The open end is
a first open end corresponding to one of the pair of clamping portions; and
a second open end corresponding to the other one of the pair of clamping portions;
the first open end and the second open end,
A headrest assembly that opens in opposite directions.
According to claim 1,
The open end is
a first open end corresponding to one of the pair of clamping portions; and
a second open end corresponding to the other one of the pair of clamping portions;
the first open end and the second open end,
A headrest assembly that opens toward the same direction as each other.
According to claim 1,
Each of the pair of clamping parts,
a first corresponding area and a second corresponding area facing each other with respect to an adjacent one of the pair of base frames; and
and a connecting region connecting the first corresponding region and the second corresponding region and located on an opposite side of the open end,
Each of the pair of clamping parts,
The headrest assembly further comprising a support block interposed between the stay and at least one of the first corresponding area and the second corresponding area.
According to claim 1,
The stay is
Connecting the pair of base frames, further comprising a connecting plate having a smaller width than the base frame in the front-rear direction,
The mobile body,
A concave space inserted into a first space defined by the pair of clamping parts and the main plate according to the movement in the front-rear direction, and a second space defined by the pair of base frames and the connection plate. , headrest assembly.
According to claim 1,
The first front and rear engaging member,
Further comprising a base rod extending along the front-rear direction,
The first engaging element is
A headrest assembly comprising front and rear positioning grooves concavely formed on an outer circumferential surface of the base rod.
7. The method of claim 6,
The base rod is
including a hollow part,
The mobile body,
a first body having a first protrusion inserted into the hollow part; and
A headrest assembly including a second body inserted into the hollow portion and provided with a second protrusion disposed to face the first protrusion, and coupled to the first body.
According to claim 1,
The second front and rear locking member,
A headrest assembly comprising a moving plate disposed parallel to the main plate.
9. The method of claim 8,
Each of the main plate and the moving plate,
A headrest assembly having a smaller width than the base frame along the front-rear direction.
9. The method of claim 8,
The second locking element is
A headrest assembly comprising a locking edge formed on the moving plate.
11. The method of claim 10,
The moving plate,
Further comprising an opening into which the first front and rear locking members are inserted,
The engaging edge is
A headrest assembly that defines an inner surface of the opening and faces the first front and rear locking members.
According to claim 1,
Further comprising: a lifting lock unit for locking the mounting base and the movable body at a position along an elevating direction crossing the front-rear direction,
The elevating lock unit,
a plurality of first elevating locking elements arranged along the elevating direction on the base frame; and
and a second lifting and lowering locking element formed on the second front and rear locking member and released from engagement with one of the plurality of first lifting and lowering locking elements by pressing the release operation member.
a stay having a pair of base frames; A main plate having a first width along a front-rear direction crossing a plane formed by the pair of base frames, is connected to both ends of the main plate, surrounds each of the pair of base frames, and the first width along the front-rear direction a mounting base having a pair of clamping portions having a second width greater than the width; and a movable body provided with a guide pin arranged in the front-rear direction so as to penetrate the clamping part, and guided along the front-rear direction by the guide pin to be relatively movable with respect to the main plate,
Each of the pair of clamping parts has an open end open laterally from the bottom to the top to receive the base frame,
At least one open end of the pair of clamping parts is open toward a direction away from the open end of the other one of the pair of clamping parts,
Each of the pair of clamping parts has a guide hole through which the guide pin is inserted, and the guide hole guides the guide pin moving in the front-rear direction.
14. The method of claim 13,
The open end is
a first open end corresponding to one of the pair of clamping portions; and
a second open end corresponding to the other one of the pair of clamping portions;
the first open end and the second open end,
A headrest assembly that opens in opposite directions.
14. The method of claim 13,
The open end is
a first open end corresponding to one of the pair of clamping portions; and
a second open end corresponding to the other one of the pair of clamping portions;
the first open end and the second open end,
A headrest assembly that opens toward the same direction as each other.
14. The method of claim 13,
Each of the pair of clamping parts,
a first corresponding area and a second corresponding area facing each other with respect to an adjacent one of the pair of base frames; and
and a connecting area connecting the first mating area and the second mating area, the connecting area being located on an opposite side of the open end.
17. The method of claim 16,
The guide hole is
Comprising a first guide hole and a second guide hole corresponding to each other,
The mounting base is
a first plate having the first corresponding region and the first guide hole formed in the first corresponding region; and
and a second plate having the second corresponding region and the second guide hole formed in the second corresponding region and coupled to the first plate.
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