KR20240115722A - Head rest module - Google Patents

Abstract

The present invention, a mounting base; a rack bracket having a rack gear unit and mounted on the mounting base to enable translational movement along an extension direction of the rack gear unit; a moving gear having a pinion gear engaged with the rack gear and being installed to enable rotational and translational movement with respect to the mounting base; and a stopping unit configured to stop the rotational movement of the moving gear as the pinion gear unit, which rotates due to the translational movement of the rack gear unit, rotates in one direction.

Description

Headrest module{HEAD REST MODULE}

The present invention relates to a headrest module that forms part of a car seat.

Generally, a head rest for an automobile is installed on the upper part of a seat, and is raised and rotated to suit the height of the occupant's head and is also used as a headrest. The headrest also supports the occupants' heads in the event of a rear-end collision to prevent neck injuries.

Recently, headrests are not only used to prevent neck injuries or as headrests, but they are also used as objects on the back of which a monitor for viewing video is attached. In this case, the headrest is manufactured so that rear passengers can move it linearly in the forward/backward direction to watch video content in the vehicle.

However, the slide module for linear movement of the headrest has a large number of parts, so its structure is complex and the manufacturing process is also difficult. In addition, this headrest has limitations in slimming by employing a slide module. This can also be an obstacle to maximizing interior space in the era of self-driving cars.

The above-mentioned background technology is technical information that the inventor possessed for deriving the embodiments of the present invention or acquired during the derivation process, and cannot necessarily be said to be known art disclosed to the general public before the present application.

One object of the present invention is to provide a headrest module that can reduce the number of required parts and simplify the manufacturing process.

Another object of the present invention is to provide a headrest module that can be slimmer than before while providing a function to adjust the position of the headrest.

A headrest module according to one aspect of the present invention for realizing the above-described problem includes a mounting base; a rack bracket having a rack gear unit and mounted on the mounting base to enable translational movement along an extension direction of the rack gear unit; a moving gear having a pinion gear engaged with the rack gear and being installed to enable rotational and translational movement with respect to the mounting base; And it may include a stopping unit formed to stop the rotational movement of the moving gear as the pinion gear unit, which rotates due to the translational movement of the rack gear unit, moves in one direction.

Here, the mounting base includes a base plate having a first guide groove that guides the translational movement of the moving gear, and the moving gear may further include a center shaft rotatably inserted into the first guide groove. You can.

Here, the first guide groove may include an advance/retract guide portion extending along a direction toward the stopping unit.

Here, the mounting base has a second guide groove formed to correspond to the first guide groove and guides the translational movement of the moving gear together with the first guide groove, and the base plate is positioned relative to the rack bracket. It may further include a cover plate disposed on the opposite side.

Here, a driving unit configured to translate the central shaft toward the stopping unit may be further included.

Here, the driving unit may include a checking spring formed to elastically bias the central shaft toward the stopping unit.

Here, the stopping unit may include a first engaging portion, and the moving gear may include a second engaging portion arranged to engage the first engaging portion as the moving gear approaches the stopping unit. there is.

Here, the first engaging part may include a first gear part formed on the mounting base, and the second engaging part may include a second gear part located at a different level from the pinion gear part.

Here, the rack bracket may further include a first guiding member located at one end of the rack gear unit and guiding the moving gear in a direction away from the rack gear unit.

Here, the first guidance member may include a guidance surface formed to form an obtuse angle with respect to the extension direction of the rack gear unit.

Here, the rack bracket may further include a second guiding member located at the other end of the rack gear unit and guiding the moving gear in a direction toward the rack gear unit.

Here, the first guide groove is a spaced guide portion that communicates with the advance and retreat guide portion and extends along a direction intersecting the extension direction of the advance and retreat guide portion to guide the moving gear guided by the first guiding member. More may be included.

Here, a driving unit configured to translate the central shaft in one of a direction toward the stopping unit and a direction away from the rack gear portion is further included, depending on the position of the central shaft. The driving unit may include a checking spring configured to elastically bias the central shaft toward the one direction.

Here, a return unit configured to restore the rack bracket to its original position while the moving gear is guided away from the rack gear unit may be further included.

Here, the return unit may include a return spring connecting the rack bracket and the mounting base.

Here, it is formed to be coupled to the seat back and may be further included in a stay mounted on the mounting base.

According to the headrest module according to the present invention configured as described above, the moving gear is formed to rotate and translate by the translational motion of the rack bracket mounted on the mounting base, and the rotation of the moving gear Since the movement is made to stop by the stopping unit, the number of parts for adjusting the position of the headrest module can be reduced and the manufacturing process can also be simplified. Furthermore, the headrest module can be slimmer than before.

Figure 1 is an assembled perspective view of the headrest module 100 according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing the mounting base 110, moving gear 130, and drive unit 170 of FIG. 1.
FIGS. 3 to 9 are diagrams for explaining the operational relationship between the rack bracket 120 and the moving gear 130 (and the stopping unit 140) in FIG. 1.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is not limited to the embodiments disclosed below, but may be subject to various changes and may be implemented in various different forms. Only this example is provided to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. Therefore, the present invention is not limited to the embodiments disclosed below, but substitutes or adds to the configuration of one embodiment and the configuration of another embodiment, as well as all changes and equivalents included in the technical spirit and scope of the present invention. It should be understood to include substitutes.

The attached drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the attached drawings, and all changes and equivalents included in the spirit and technical scope of the present invention are not limited to the attached drawings. It should be understood to include water or substitutes. In the drawings, components may be expressed exaggeratedly large or small in size or thickness for convenience of understanding, etc., but the scope of protection of the present invention should not be construed as limited due to this.

The terms used in this specification are only used to describe specific implementations or examples, and are not intended to limit the invention. And singular expressions include plural expressions, unless the context clearly dictates otherwise. In the specification, terms such as ~include, ~consist of, etc. are intended to designate the presence of features, numbers, steps, operations, components, parts, or a combination thereof described in the specification. That is, in the specification, terms such as ~include, ~consist of, etc. should be understood as not precluding the existence or addition possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is said to be "connected/connected" or "connected" to another component, it may be directly connected/connected to that other component, but there may be other components in the middle. It must be understood that it may exist. On the other hand, when it is mentioned that a component is “directly connected/connected” or “directly connected” to another component, it should be understood that there are no other components in between.

When a component is referred to as being "on top" or "below" another component, it should be understood that not only is it placed directly on top of the other component, but there may also be other components in between. .

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

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

Referring to this drawing, the headrest module 100 forms most of the mechanical structure of the headrest. After the cushion is added to the headrest module 100, when the outer shell is finally covered, it becomes a headrest. The headrest is connected to the seat back of the car (not shown) and supports the head of the seated person.

The headrest module 100 may include a mounting base 110, a rack bracket 120, a moving gear 130, a stopping unit 140, a return unit 150, and a stay 160.

The mounting base 110 may be mounted on a stay 160, which will be described later. The mounting base 110 may be specifically placed on the upper surface of the stay 160.

The rack bracket 120 is mounted to enable translational movement along the front-back directions (F and B) with respect to the mounting base 110. The forward and backward directions (F and B) are the forward direction (F) in which the headrest module 100 approaches the head of the person sitting on the seat (left direction in the drawing), and the backward direction (F) in which the headrest module 100 moves away from it (right direction in the drawing). It is an integrated approach. The rack bracket 120 has a rack gear portion 121. The rack gear unit 121 may be arranged to extend along the front-back directions (F and B). The cushion may be coupled to the rack bracket 120.

The moving gear 130 may have a gear unit (pinion gear unit 131, see FIG. 2) engaged with the rack gear unit 121. The moving gear 130 is installed to enable not only rotational movement but also translational movement with respect to the mounting base 110.

The stopping unit 140 is a component that selectively stops the rotational movement of the moving gear 130. Specifically, the stopping unit 140 stops the rotation of the moving gear 130 as the moving gear 130 moves in translation in the direction toward the stopping unit 140. The moving gear 130 may stop rotating as it engages the stopping unit 140. In contrast, the moving gear 130 translates in a direction away from the stopping unit 140 and can rotate without limitation when spaced apart from the stopping unit 140. The stopping unit 140 may be integrated into the mounting base 110.

The return unit 150 moves the rack bracket 120 in the backward direction (B) and returns it to its original position. The return unit 150 may return the rack bracket 120 while the pinion gear unit 131 is spaced apart from the rack gear unit 121. The return unit 150 may be, for example, a return spring that connects the rack bracket 120 and the mounting base 110.

The stay 160 is connected to the seat back. As described above, the mounting base 110 may be coupled to the upper part of the stay 160. The mounting base 110 may be specifically welded to the stay 160.

FIG. 2 is an exploded perspective view showing the mounting base 110, moving gear 130, and drive unit 170 of FIG. 1.

Referring to this drawing, the mounting base 110 may have a base plate 111. The bottom of the base plate 111 may be welded to the stay 160. A first guide groove 113 may be formed in the base plate 111 to guide the translational movement of the moving gear 130. The central axis of rotation of the moving gear 130, that is, the central shaft 135, is the first guide. It is rotatably inserted into the groove 113.

The first guide groove 113 may have an advance/retract guide portion 114 and a separation guide portion 115. The forward/backward guide unit 114 may extend along a direction toward the stopping unit 140 (forward/backward direction (F and B)). The spacing guide unit 115 may extend in a direction intersecting the extension direction of the advance/retract guide unit 114, for example, in the left and right directions (S and A). One end of the spacing guide part 115 may be connected to one end of the advance/retract guide part 114. The spacing guide unit 115 may guide the moving gear 130 in a direction away from the rack gear unit 121. These 114 and 115 may have a generally vertical relationship to each other.

Mounting base 110 may also further include a cover plate 116. The cover plate 116 together with the base plate 111 may define a space into which the rack bracket 120 is inserted. To this end, the cover plate 116 is disposed on the opposite side of the base plate 111 with respect to the rack bracket 120. The cover plate 116 may be coupled to the base plate 111 or may be coupled to the stay 160. The cover plate 116 may have a second guide groove 118 corresponding to the first guide groove 113. These (113 and 118) guide the moving gear 130 to make translational and rotational movements while maintaining a stable posture.

The moving gear 130 may further include an additional gear unit 133 in addition to the pinion gear unit 131. The gear unit 133 may be located at a different level from the pinion gear unit 131, specifically, below the pinion gear unit 131. The gear unit 133 has a larger size than the pinion gear unit 131, but individual gears may be smaller than the pinion gear unit 131. A central shaft 135 may be disposed at the center of these gear units 131 and 133.

The stopping unit 140 may have a body 141 integrated with the base plate 111. A first engaging portion 145 may be formed on the side of the body 141 facing the moving gear 130. The first engaging portion 145 engages with the gear portion 133 (second engaging portion) as the moving gear 130 approaches. When the first engaging portion 145 is formed as a gear portion (first gear portion), the second engaging portion 133 may also be formed as a gear portion (second gear portion).

A driving unit 170 may be additionally provided to translate the moving gear 130 within the first guide groove 113. The drive unit 170 translates the moving gear 130 along the direction toward the stopping unit 140 within the advance/retract guide unit 114, or moves the moving gear 130 within the spacing guide unit 115 to the rack gear unit 121. It is intended to cause translational movement along a direction away from .

The drive unit 170 may be, for example, a checking spring that elastically biases the central shaft 135 along the above direction. One end 171 of the checking spring may be mounted on the cover plate 116, and the other end 173 may be mounted on the central shaft 135. The middle area between both ends 171 and 173 may be a tension portion 175 that exerts elastic force. The tension part 175 may be a part bent to form an arc shape.

Now, with reference to FIGS. 3 to 9 , a description will be given of how the headrest module 100 is positioned along the forward and backward directions (F and B). FIGS. 3 to 9 are diagrams for explaining the operational relationship between the rack bracket 120 and the moving gear 130 (and the stopping unit 140) in FIG. 1.

First, the rack bracket 120 will be further described with reference to FIG. 3 . The rack bracket 120 may have a main plate 122 on which the rack gear portion 121 is formed. The main plate 122 may be arranged substantially parallel to the base plate 111. A cutout portion 123 may be formed in the main plate 122. A rack gear portion 121 is formed at one corner defining the cutout portion 123.

A first guiding member 125 may be coupled to one end of the rack gear unit 121 to guide the moving gear 130 in a direction away from the rack gear unit 121. The first guiding member 125 may have a guiding surface 126 forming an obtuse angle with respect to the extension direction of the rack gear unit 121. The guiding surface 126 is generally an inclined surface and may be a flat or curved surface.

A second guiding member 127 may be formed on the other end of the rack gear unit 121. The second guiding member 127 may be specifically formed at another corner defining the cutout portion 123. The second guiding member 127 is for guiding the moving gear 130 toward the rack gear unit 121. The second guiding member 127 may also have a guiding surface 128 facing the guiding surface 126.

In this drawing, the first guiding member 125 is separately assembled to the main plate 122 and the second guiding member 127 is illustrated as integrated with the main plate 122. However, this is only considering the assembly method and the present invention It is not limited to that. Both of them 125 and 127 may be integrated into the main plate 122, or may be assembled separately.

Referring again to FIG. 3, the headrest module 100 is moved to its maximum in the reverse direction (B). The pinion gear unit 131 is meshed with the rack gear unit 121 at one end. The second gear unit 133 is meshed with the first gear unit 145. In order to adjust the position of the headrest module 100 along the front-back directions (F and B), the user must move the rack bracket 120 in the forward direction (F).

Referring to FIG. 4, as the rack bracket 120 moves in the forward direction (F), the pinion gear unit 131 is located in another part of the rack gear unit 121, for example, in the central part. During this movement process, changes in the positional relationship between the rack gear unit 121 and the pinion gear unit 131 will be described with reference to FIGS. 5 and 6.

Referring to Figures 5 and 6, as the rack bracket 120 is pulled in the forward direction (F), the rack gear unit 121 rotates the pinion gear unit 131 counterclockwise in the drawing. Due to the action between the rack gear unit 121 and the pinion gear unit 131, the moving gear 130 is also translated in the forward direction (F). Specifically, the center shaft 135 moves along the forward direction F within the advance/retract guide unit 114. As a result, as the second gear unit 133 is spaced apart from the first gear unit 145, rotational movement of the pinion gear unit 131 becomes possible (see FIG. 6).

When the force pulling the rack bracket 120 is removed, the moving gear 130 is translated toward the stopping unit 140 by the force of the driving unit 170 (see FIG. 2). As the second gear unit 133 is engaged with the first gear unit 145, rotational movement of the moving gear 130 becomes impossible (see FIG. 5). Accordingly, the user can fix the headrest module 100 at a desired position.

Referring to FIG. 7, the user can pull the rack bracket 120 to the maximum. Accordingly, the pinion gear unit 131 is engaged with the end area of the rack gear unit 121. The pinion gear unit 131 engages with the first guiding member 125 and receives force in a direction away from the rack gear unit 121.

Referring to FIG. 8, the central shaft 135 of the moving gear 130 is translated to a position spaced apart from the rack gear portion 121 along the spaced guide portion 115 of the first guide groove 113. The moving gear 130 is moved along the separation direction (S). Now, the pinion gear unit 131 is out of the meshed state with the rack gear unit 121.

Referring to FIG. 9, in a state where the pinion gear unit 131 is spaced apart from the rack gear unit 121, the rack bracket 120 moves in the reverse direction (B) by the action of the return unit 150. The pinion gear unit 131 engages with the second guiding member 128 and receives force in the direction A approaching the rack gear unit 121. Accordingly, the moving gear 130 may return to the state shown in FIG. 3.

In summary, as the user pulls the rack bracket 120 in the forward direction (F), the headrest module 100 is positioned in one of the positions from the state (position) in FIG. 3 to the state (position) in FIG. 7. can do. The rack bracket 120, the moving gear 130, and the stopping unit 140 move the rack bracket 120 back and forth between the states of FIGS. 5 and 6 to advance and fix the rack bracket 120 (at one advanced position). When the user pulls the rack bracket 120 in the forward direction (F) to the maximum, the return spring acts while the pinion gear unit 131 is separated from the rack gear unit 121, and the headrest module 100 automatically You can return to the maximum retreated state.

100: headrest module 110: mounting base
120: Rack bracket 130: Moving gear
140: Stopping unit 150: Recovery unit
160: stay 170: driving unit

Claims (16)

mounting base;
a rack bracket having a rack gear unit and mounted on the mounting base to enable translational movement along an extension direction of the rack gear unit;
a moving gear having a pinion gear engaged with the rack gear and being installed to enable rotational and translational movement with respect to the mounting base; and
A headrest comprising a stopping unit formed to stop the rotational movement of the moving gear as the pinion gear unit, which rotates due to the translational movement of the rack gear unit, moves in one direction.
According to paragraph 1,
The mounting base is,
It includes a base plate having a first guide groove that guides the translational movement of the moving gear,
The moving gear is,
A headrest module further comprising a center shaft rotatably inserted into the first guide groove.
According to paragraph 2,
The first guide groove is,
A headrest module comprising an advance/retract guide portion extending along a direction toward the stopping unit.
According to paragraph 2,
The mounting base is,
A cover plate having a second guide groove formed to correspond to the first guide groove and guiding the translational movement of the moving gear together with the first guide groove, and disposed on an opposite side of the base plate with respect to the rack bracket. Further comprising a headrest module.
According to paragraph 2,
A headrest module further comprising a drive unit configured to translate the central shaft toward the stopping unit.
According to clause 5,
The driving unit is,
A headrest module comprising a checking spring configured to elastically bias the central shaft toward the stopping unit.
According to paragraph 1,
The stopping unit is,
Includes a first engaging portion,
The moving gear is,
A headrest module comprising a second engaging portion arranged to engage the first engaging portion as the moving gear approaches the stopping unit.
In clause 7,
The first engaging portion,
It includes a first gear portion formed on the mounting base,
The second engaging portion,
A headrest module comprising a second gear unit located at a different level from the pinion gear unit.
According to paragraph 3,
The rack bracket is,
The headrest module further includes a first guiding member located at one end of the rack gear unit and guiding the moving gear in a direction away from the rack gear unit.
According to clause 9,
The first guiding member is,
A headrest module comprising a guiding surface formed to form an obtuse angle with respect to the extension direction of the rack gear portion.
According to clause 9,
The rack bracket is,
The headrest module further includes a second guiding member located at the other end of the rack gear unit and guiding the moving gear in a direction toward the rack gear unit.
According to clause 9,
The first guide groove is,
The headrest module further includes a spacing guide part that communicates with the advance and retreat guide part and extends along a direction intersecting the extension direction of the advance and retreat guide part to guide the moving gear guided by the first guiding member.
According to clause 12,
Depending on the position of the central shaft, it further includes a driving unit configured to translate the central shaft in one of a direction toward the stopping unit and a direction away from the rack gear portion.
The driving unit is,
A headrest module comprising a checking spring configured to elastically bias the central shaft toward the one direction.
According to clause 9,
The headrest module further includes a return unit configured to restore the rack bracket to its original position while the moving gear is guided away from the rack gear unit.
According to clause 14,
The return unit is,
A headrest module comprising a return spring connecting the rack bracket and the mounting base.
According to paragraph 1,
A headrest module formed to be coupled to a seat back and further comprising a stay mounted on the mounting base.

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