KR20230115637A - Headrest with adjustable angle - Google Patents

Abstract

The present invention relates to an angle-adjustable headrest, which includes a main body connected to a main plate and having a flow space therein, a main body rotatably installed in the main plate, and an end portion connected to a wing plate together with the wing plate. A hinge axis that rotates, a ratchet gear that is coupled to the hinge axis and rotates together, a number of valleys and mountains are formed, and a ratchet gear that rotates within a limited range in the flow space, and is installed to rotate in a hinge on the main body, A stopper that generates a braking force against the rotation of the ratchet gear when in contact with the goal, and a clutch part that is rotatably coupled to the hinge shaft and operates to allow or release the stopper from contacting the ratchet gear. It is possible to ensure that the folded state is firmly maintained at each folding angle.

Description

Headrest with adjustable angle { Headrest with adjustable angle }

The present invention relates to an angle-adjustable headrest, and in particular, the left and right side surfaces of the headrest are configured to be folded inward at multiple angles, and the angle adjustment is made so that the folded state is firmly maintained at each angle at which the left and right side surfaces are folded. This is about possible headrests.

In general, a headrest for a vehicle serves as a pillow that comfortably supports the head of the occupant in normal times, and in the event of an accident, it is placed on the upper part of the backrest of the seat to prevent neck injuries by supporting the head so that it does not tilt backwards sharply. to install and use.

In general, the headrest wing refers to the left and right parts of the headrest, and gives a sense of volume to the left and right to stably support the head of the occupant.

Among conventional headrests, there is one in which the angle of the headrest wing can be adjusted according to the convenience of the occupant.

Korean Patent Laid-Open Publication No. 10-2011-0002542 uses the elasticity of a torsion spring to adjust the angle of a wing plate. When the wing plate rotates in the forward direction, the angle of the wing plate is fixed using the ratchet gear that rotates along the wing plate and the stopper on the ratchet gear. As a result, the wing plate returns to a state parallel to the center plate.

However, since such conventional headrests help tilt the head of the occupant back and forth by adjusting the front and rear angles, but the width of the headrest cannot be adjusted, the occupant's head still shakes left and right according to the shaking of the vehicle. There was a problem that caused discomfort to the occupants.

Meanwhile, Korean Patent Publication No. 10-2011-0002542 discloses a headrest in which wing plates installed on both sides of a center plate are rotated forward and backward by a hinge part.

1 is a front view schematically showing a conventional headrest.

The headrest includes a center plate 110 supporting the back of the passenger; a wing plate 120 that is fastened to both sides of the center plate 110 and rotates in the forward and backward directions to be folded and unfolded at a certain angle to support both sides of the passenger's head; It consists of a hinge part 30 for fastening the wing plate 120 to the center plate 110 rotatably in the forward and backward directions.

FIG. 2 is a cross-sectional view of the hinge part 130 of FIG. 1 .

The hinge part 130 is composed of a fixed body 310, a pivoting shaft 320, a torsion spring 340, a pivoting plate 350, and a stopper 360. The fixing body 310 is fixed inside both sides of the center plate 110, and the fixing body 310 is vertically coupled with the cover 330 accommodating the fixing body 310 therein. The rotation shaft 320 is vertically coupled to the inside of the fixed body 310 so that the upper and lower ends can be exposed to the outside of the fixed body 310 . The upper and lower ends of the rotation shaft 320 are fixed to the wing plate 120, respectively. When the wing plate 120 rotates in the forward and backward directions, the rotation shaft 320 rotates forward and backward.

When the wing plate 120 rotates in the forward and backward directions, the torsion spring 340 returns the rotating shaft 320, which is rotated forward and backward. The rotating plate 350 is shaft-coupled with the rotating shaft 320 and rotates forward and backward along the rotating shaft 320. A plurality of ratchet gears 352 are formed at regular intervals in a mountain shape on a portion of the outer periphery of the rotating plate 350. is formed by protruding outward.

A release end portion 356 and an inlet end portion 354 are formed to protrude outward on both sides of the ratchet gear 352 so as to be located at a distance adjacent to the ratchet gear 352.

The stopper 360 is rotatably coupled to the shaft 361 formed on the fixed body 310. On one side of the stopper 360, a fitting protrusion 362 fitted and fixed to the inside of the release end 356 of the rotation plate 350 protrudes toward the inside of the release end 356.

On the upper side of the other side of the stopper 360, a releasing protrusion 364 fitted and fixed to the inside of the lead-in end 354 of the rotation plate 350 protrudes toward the inside of the lead-in end 354.

The fitting protrusion 362 and the release protrusion 364 are fitted and fixed inside the release end 356 and the inlet end 354, respectively, by the torsion spring 370 supported by the fitting protrusion 362 and the fixing body 310. remain in state The torsion spring 370 is spaced apart from the shaft 361 and is installed in a position close to the fitting protrusion 362 .

On the other hand, in the structure of this headrest, the stopper 360 rotates around the shaft 361 by the pushing force of the torsion spring 370 and comes into close contact with the ratchet gear 352 to generate a braking force. In addition, when the user applies force to the wing plate 120 to rotate it, the pivot shaft 320 connected to the wing plate 120 is rotated to move the ratchet gear 352, and thus the stopper 360 is a torsion spring ( 370) overcomes the elastic force and is lifted and goes to the next ratchet gear 352.

However, when the elastic force of the torsion spring 370 decreases or a strong force is transmitted to the wing plate 120, the stopper 360 overcomes the force of the torsion spring 370 and separates from the ratchet gear 352 even if the user does not operate will do In this case, the wing plate 120 rotates arbitrarily against the user's intention, causing inconvenience to the user.

The present invention is to solve the above problems, and an object of the present invention is to configure the left and right side surfaces of the headrest to be folded inward at multiple angles, and to adjust the angle so that the folded state is firmly maintained at each folding angle. This is to provide a possible headrest.

The present invention for achieving the above object,

In the angle-adjustable headrest, which has a main plate in the center and wing plates rotating forward and backward are installed on both sides of the main plate,

a main body connected to the main plate and having a flow space therein;

a hinge shaft rotatably installed in the main plate and having an end connected to the wing plate to rotate together with the wing plate;

a ratchet gear that is coupled to the hinge shaft and rotates together, has a plurality of valleys and hills, and rotates within a limited range in the flow space;

a stopper installed in the main body to be hingedly rotated and generating a braking force for the rotation of the ratchet gear when in contact with the bone of the ratchet gear; and

It provides an angle-adjustable headrest that is rotatably coupled to the hinge shaft and includes a clutch unit that allows or disengages the stopper from contacting the ratchet gear.

Locking jaws are formed at both ends of the flow space in the main body, and both ends of the ratchet gear come into contact with the locking jaws, thereby limiting the rotational width of the ratchet gear.

A pair of guide pins are fixed to the ratchet gear, and the pair of guide pins push the left or right side of the protrusion formed on the clutch part to rotate the clutch part.

In a state in which the stopper is in contact with the valley of the ratchet gear, the end surface of the stopper is configured to contact perpendicularly to the rotational direction of the ratchet gear, so that the stopper completely brakes the rotation of the ratchet gear in one direction do.

A groove on which the stopper can be placed is formed at an upper portion of the protrusion, and while the stopper is in contact with the groove, the stopper does not come into contact with the ratchet gear so that the ratchet gear can move in a circular shape.

The stopper receives an elastic force from a compression spring installed in the main body to obtain force to be in close contact with the ratchet gear.

A torsion spring surrounding the rotating shaft is installed in the main body, and the torsion spring prevents movement of the rotating shaft within a range of frictional force in contact with the rotating shaft.

As described above, the present invention has an effect that the braking state of the stopper and the ratchet gear is solid, so that the rotation shaft and the wing plate are not rotated unintentionally by the user, giving the user a sense of satisfaction.

1 is a longitudinal sectional view of a conventional headrest;
2 is a cross-sectional view of the headrest shown in FIG. 1;
3 is a conceptual diagram of a headrest according to an embodiment of the present invention;
4 is a cross-sectional view and a longitudinal sectional view of the hinge portion of the headrest shown in FIG. 3;
5 is a conceptual perspective view showing the internal structure of the hinge portion shown in FIG. 4;
6 is a perspective view of the torsion spring shown in FIG. 4;
7 to 9 are cross-sectional views showing the operating process of the hinge portion shown in FIG. 4;
10 is a view listing a series of operating processes of the hinge part shown in FIGS. 7 to 9 .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The detailed description of the present invention which follows refers to the accompanying drawings which illustrate, by way of illustration, specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable one skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different from each other but are not necessarily mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in another embodiment without departing from the spirit and scope of the invention in connection with one embodiment. Additionally, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the detailed description set forth below is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all equivalents as claimed by those claims. Like reference numbers in the drawings indicate the same or similar function throughout the various aspects.

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

As shown in FIGS. 3 to 6, the headrest of this embodiment has a main plate 1 at the center, and wing plates 2 rotated forward and backward are installed on both sides of the main plate 1 Headrest capable of adjusting the angle am.

As a means for controlling the rotation of the wing plate (2), connected to the main plate (1), the main body (10) having a flow space therein; A hinge shaft 20 rotatably installed in the main plate 1 and having an end 34 connected to the wing plate 2 to rotate together with the wing plate 2; A ratchet gear 30 that is coupled to the hinge shaft 20 and rotates together, has a plurality of valleys 32 and mountains 33, and rotates within a limited range in the flow space; A stopper 50 installed to be hingedly rotated in the main body 10 and generating a braking force for rotation of the ratchet gear 30 when in contact with the valley 32 of the ratchet gear 30; and a clutch unit 40 rotatably coupled to the hinge shaft 20 and allowing the stopper 50 to come into contact with the ratchet gear 30 or releasing the clutch unit 40 .

In the main body 10, locking jaws 12 are formed at both ends 34 of the flow space, and both ends 34 of the ratchet gear 30 come into contact with the locking jaw 12, so that the ratchet gear 30 rotation range is limited.

A pair of guide pins 36 are fixed to the ratchet gear 30, and the pair of guide pins 36 rotate the clutch unit 40 by pushing the left or right side of the protrusion 42 formed on the clutch unit 40. .

A groove 44 on which the stopper 50 can be placed is formed on the upper part of the protrusion 42, and while the stopper 50 is in contact with the groove 44, the stopper 50 does not contact the ratchet gear 30. Otherwise, the ratchet gear 30 can move in a circular shape.

The stopper 50 receives elastic force from the compression spring 60 installed on the main body 10 to obtain force in close contact with the ratchet gear 30, and is rotatable on the rotation shaft 50 installed on the main body 10 be installed In a state in which the stopper 50 is in contact with the valley 32 of the ratchet gear 30, the end surface of the stopper 50 is in vertical contact with the rotational direction of the ratchet gear 30, so that the stopper 50 is ratchet The rotation of the gear 30 in one direction can be completely braked. If the middle portion of the stopper 50 is bent at a predetermined angle, a narrow space can be efficiently utilized in relation to the compression spring 60.

A torsion spring 70 surrounding the hinge shaft 20 is installed in the main body 10, and the movement of the hinge shaft 20 is prevented within the range of frictional force in which the torsion spring 70 contacts the hinge shaft 20. do.

The hinge shaft 20 has an elliptical shape at a portion coupled to the ratchet gear 30, and the central hole of the ratchet gear 30 also has an elliptical shape so that the ratchet gear 30 and the hinge shaft 20 rotate together .

In addition, at a portion where the hinge shaft 20 and the clutch unit 40 are coupled, the hinge shaft 20 is formed in a circular shape, and the center hole of the clutch unit 40 is also formed in a circular shape, so that the clutch unit 40 is formed in a circular shape. 20) is free to wander.

As shown in FIG. 6, in the torsion spring 70, a circular portion 72 rolled into a circular shape is coupled to a rotating shaft 52, and a protruding straight portion 74 is fixed to the main body 10.

Looking at the operation process of such a headrest, the wing plate 2 is in a basic position relative to the main plate 1 as shown in FIG. 7 .

The stopper 50 is coupled to the bone 32 of the ratchet gear 30 and the compression spring 60 pushes the stopper 50 toward the ratchet gear 30 to generate a braking force to the ratchet gear 30. In particular, a perfect braking force is generated for the clockwise rotation of the ratchet gear 30 . As a result, a complete braking force is generated for the wing plate 2 being tilted backward with respect to the main plate 1. In this state, the clutch unit 40 is caught on the guide pin 36 on the left side and cannot rotate to the left anymore, and does not affect the stopper 50.

In this state, as shown in FIG. 8, when the hinge shaft 20 is rotated 20 degrees to the left, the stopper 50 overcomes the elastic force of the compression spring 60 and crosses the hill 33 to be positioned at the next valley 32. . In this state, the stopper 50 generates a strong braking force for the clockwise rotation of the ratchet gear 30. In this state, the clutch unit 40 is caught on the guide pin 36 on the right side and cannot rotate to the right any longer, and does not affect the stopper 50.

In this state, as shown in FIG. 9, when the hinge shaft 20 rotates an additional 15 degrees in addition to 20 degrees to the left, the ratchet gear 30 rotates and the guide pin 36 moves the right side of the clutch unit 40. The clutch part 40 is rotated by pushing. Accordingly, the stopper 50 overcomes the elastic force of the compression spring 60 and is seated in the groove 44 of the clutch unit 40 to be separated from the ratchet gear 30. And, the ratchet gear 30 is no longer rotated because the left end 34 is caught on the locking jaw 12 on the left.

In this state, since the ratchet gear 30 is separated from the stopper 50, the ratchet gear 30 can be reversely rotated back to the initial state as shown in FIG. 7.

A series of operation processes are shown in FIG. 10 .

On the other hand, the torsion spring 70 generates a predetermined braking force for the rotation of the hinge shaft 20 by frictional force in contact with the hinge shaft 20 due to the torque generated by itself, so that the hinge shaft 20 moves unnecessarily Do not do this. Of course, when the user applies a strong rotational force to the hinge shaft 20 through the wing plate 2, the hinge shaft 20 overcomes the frictional force of the torsion spring 70 and rotates.

The present invention is not limited thereto, and may be modified in various forms by those skilled in the art without departing from the spirit and scope of the appended claims below, and therefore, such modifications should be construed as falling within the scope of the present invention. something to do.

1: main plate 2: wing plate
10: main body 12: locking jaw
16: floating space
20: axis of rotation
30: ratchet gear 32: goal
33: mountain 34: end
36: guide pin
40: clutch part 42: protrusion part
44: home
50: stopper 52: axis of rotation
60: compression spring
70: torsion spring 72: circular part
74: straight part

Claims (7)

In the angle-adjustable headrest, which has a main plate in the center and wing plates rotating forward and backward are installed on both sides of the main plate,
a main body connected to the main plate and having a flow space therein;
a hinge shaft rotatably installed in the main plate and having an end connected to the wing plate to rotate together with the wing plate;
a ratchet gear that is coupled to the hinge shaft and rotates together, has a plurality of valleys and hills, and rotates within a limited range in the flow space;
a stopper installed in the main body to be hingedly rotated and generating a braking force for the rotation of the ratchet gear when in contact with the bone of the ratchet gear; and
and a clutch unit rotatably coupled to the hinge shaft and configured to allow or disengage the stopper from contacting the ratchet gear. According to claim 1,
An angle-adjustable headrest, characterized in that the main body has locking jaws formed at both ends of the flow space, and both ends of the ratchet gear are in contact with the locking jaws, thereby limiting the rotational width of the ratchet gear. . According to claim 1,
A pair of guide pins are fixed to the ratchet gear, and the pair of guide pins push the left or right side of the protrusion formed on the clutch part to rotate the clutch part. According to claim 1,
In a state in which the stopper is in contact with the valley of the ratchet gear, the end surface of the stopper is configured to contact perpendicularly to the rotational direction of the ratchet gear, so that the stopper completely brakes the rotation of the ratchet gear in one direction An angle-adjustable headrest characterized by doing. The method of claim 4,
A groove on which the stopper can be lifted is formed at the upper part of the protrusion, and while the stopper is in contact with the groove, the stopper does not contact the ratchet gear so that the ratchet gear can move in a circular shape. Characterized in that Angle-adjustable headrest. The method of claim 1,
The angle-adjustable headrest, characterized in that the stopper receives the elastic force from the compression spring installed on the main body to obtain force in close contact with the ratchet gear. The method of claim 1,
An angle-adjustable headrest, characterized in that the main body is provided with a torsion spring surrounding the rotating shaft, and the torsion spring blocks the movement of the rotating shaft within a range of frictional force in contact with the rotating shaft.