WO2020080699A1

WO2020080699A1 - Unit chair

Info

Publication number: WO2020080699A1
Application number: PCT/KR2019/012517
Authority: WO
Inventors: 고기문
Original assignee: 오스템임플란트 주식회사
Priority date: 2018-10-15
Filing date: 2019-09-26
Publication date: 2020-04-23
Also published as: KR102157423B1; KR20200042096A

Abstract

The present invention relates to a unit chair and, more specifically, to a unit chair including a link part capable of adjusting the angle of a headrest. In a unit chair according to one embodiment of the present invention, the link part comprises: a first link member fixed to a backrest of the unit chair; a first link shaft; and a second link member of which one end portion is linked to the first link member by means of the first link shaft so as to be rotatable around the central axis of the first link shaft, wherein a plurality of first ratchet grooves aligned in an annular shape around the central axis of the first link shaft are formed on one surface of the first link shaft, and the second link member can include: a first elastic member; a plurality of first pins, which are aligned in an annular shape, are supported by means of the first elastic member, and are fastened to the first ratchet grooves by means of the restoring force of the first elastic member so as to prevent one-way rotation of the second link member; and a releasing part for transmitting external force to the elastic member when the external force is applied, so as to release the engagement of the first ratchet groove and the first pin, and enabling the bidirectional rotation of the second link member.

Description

Unit chair

The present invention relates to a unit chair, and more particularly, to a unit chair including a link portion capable of adjusting the angle of the headrest.

The unit chair is a device for accommodating the examinee in a dentistry or the like, and generally includes a headrest supporting the examinee's head, a backrest supporting the back, and a legrest supporting the hips and legs. In addition to this, it may further include a doctor table and a drinking fountain for mounting a dental procedure tool such as a handpiece.

The headrest is formed on the top of the backrest, and it is preferable that the angle can be adjusted according to the purpose of medical treatment, the body shape of the patient, and the convenience of the medical staff. If you look at the situation of medical treatment that requires the angle adjustment of the headrest, the medical staff often hold the treatment tool in one hand, so you cannot use both hands freely, or the head of the examinee often places a load on the headrest.

Therefore, when the examinee intends to adjust the angle of the headrest in a direction (forward direction) where the head is bowed forward, it is preferable to adjust the angle by simply pushing the headrest lightly without operating a separate button or lever. In addition, on the contrary, it is possible to adjust the angle in the direction of erecting the head of the examinee (reverse direction) only when a separate button or lever is operated, and if not, it is better to hold the head firmly.

Accordingly, there may be a case in which the above-mentioned object is achieved by introducing a mechanism capable of rotational movement in only one direction using a ratchet or the like into the connection portion between the headrest and the backrest. However, when excessive force is applied in the reverse direction, a part of the ratchet may be damaged or worn out, resulting in loss of function, which may cause durability problems.

On the other hand, when a two-joint link is introduced into the configuration for adjusting the angle of the headrest, the height of the head of the examinee can be adjusted, and at the same time, an appropriate face angle for treatment can be generated, thereby providing convenience for treatment have. The restraint state of the two joints is preferably configured to be released through one button or lever.

Even in the case of such a two-joint headrest, it is desirable to introduce a mechanism configuration in which the angle can be freely adjusted only in one direction as described above. However, if a configuration that can be rotated only in the forward direction is introduced in addition to the two-joint link configuration, a problem that the configuration becomes complicated may occur. In addition, it may be difficult to maintain a configuration that releases the motion restraint state of two joints with only one button.

The present invention has been devised in view of the above problems, and aims to provide a unit chair capable of adjusting the forward angle of the headrest, but ensuring the durability of the supporting structure when a force in the reverse direction is applied. There is this.

In addition, another object of the present invention is to provide a simple mechanism configuration capable of introducing a one-way angle adjustment function to the two-joint headrest of the unit chair.

Furthermore, another object of the present invention is to provide a configuration of a two-joint headrest capable of angular adjustment in one direction while releasing the motion restraint state of two joints with only one button.

A unit chair including a link portion capable of adjusting an angle of a headrest according to an embodiment of the present invention for achieving the above object, wherein the link portion comprises: a first link member fixed to a backrest of the unit chair; A first link shaft; And a second link member having one end linked to the first link member by the first link shaft and rotatable about a central axis of the first link shaft, wherein the first link shaft has a second link member. A plurality of first ratchet grooves arranged in an annular shape around a central axis of one link shaft are formed, and the second link member includes: a first elastic member; A plurality of first pins arranged in an annular shape, supported by the first elastic member, and fastened to the first ratchet groove by the restoring force of the first elastic member to prevent rotation of the second link member in one direction; And when an external force is applied, release the fastening of the first ratchet groove and the first pin by transmitting the external force to the elastic member, and a release unit enabling rotation in both directions of the second link member. have.

And, the unit chair, the second link shaft; And a third link member having a headrest fixed to one surface and being connected to the opposite end of the one end of the second link member by the second link shaft so as to be rotatable about a central axis of the second link shaft. It may further include.

In addition, a plurality of grooves arranged in an annular shape around a central axis of the second link shaft is formed on one surface of the second link shaft, and the second link member includes: a second elastic member; And a plurality of second pins arranged in an annular shape, supported by the second elastic member, and fastened to the groove by the restoring force of the second elastic member, wherein the release unit is applied when the external force is applied. , It is preferable to release the fastening of the groove and the second pin by transmitting the external force to the second elastic member, and enable rotation in both directions of the third link member.

Meanwhile, when the groove is a second ratchet groove and the second pin is fastened to the second ratchet groove, it is preferable to prevent rotation of the third link member in one direction.

In addition, when the central axis of the first link shaft and the central axis of the second link shaft are parallel, and no external force is applied to the release unit, a direction in which the second link member is rotatable and the third link member are rotated It is preferable that the possible directions are opposite to each other.

In addition, when the second pin is fastened to the groove, it is preferable to prevent rotation of the third link member in both directions.

The release unit, a button unit to which the external force is applied; And an operating member receiving the external force from the button portion and simultaneously transmitting the external force to the first elastic member and the second elastic member.

A roller or a ball may be formed at each end of the first pin fastened to the first ratchet.

According to various embodiments of the present invention, the angle adjustment of the forward direction of the headrest of the unit chair is freely possible, but the durability of the supporting structure can be secured when a force in the reverse direction is applied.

In addition, according to various embodiments of the present invention, it is possible to provide a simple mechanism configuration capable of introducing a one-way angle adjustment function to the two-joint headrest of the unit chair.

In addition, according to various embodiments of the present invention, it is possible to configure a two-joint headrest capable of adjusting an angle in one direction while being able to release a motion restraint state of two joints with only one button.

1 is an exemplary view showing the appearance of a unit chair according to an embodiment of the present invention.

2 is a view showing the configuration of the link portion of the unit chair according to an embodiment of the present invention.

Figure 3 is an exploded view showing the configuration of the link portion of the unit chair according to an embodiment of the present invention.

4 is a view showing the configuration of a first link shaft according to an embodiment of the present invention.

5 is a view showing a fastening state of the first pin and the first link shaft according to an embodiment of the present invention.

6 is a view showing the configuration of the release portion and the pin according to an embodiment of the present invention.

The following merely illustrates the principles of the present invention. Therefore, those skilled in the art may implement various principles included in the concept and scope of the present invention and implement the principles of the present invention, although not explicitly described or illustrated in the present specification. In addition, all conditional terms and examples listed in this specification are intended to be expressly intended only for the purpose of understanding the concept of the present invention in principle, and should be understood as not limited to the specifically listed examples and states. do.

In addition, it should be understood that all detailed descriptions that list the principles, aspects and embodiments of the invention, as well as specific embodiments, are intended to include structural and functional equivalents of these matters. It should also be understood that these equivalents include all currently invented equivalents as well as equivalents to be developed in the future, ie all devices invented to perform the same function regardless of structure.

The above objects, features, and advantages will become more apparent through the following detailed description in connection with the accompanying drawings, and accordingly, those skilled in the art to which the present invention pertains can easily implement the technical spirit of the present invention. There will be. In addition, in the description of the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

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

1 is an exemplary view showing the appearance of a unit chair according to an embodiment of the present invention. 1, the unit chair 10 of the present invention may include a legrest 11, a backrest 13, a headrest 15 and a link portion 100. The headrest 15 supports the head of the examinee, the backrest 13 is a configuration for supporting the back of the examinee, and the legrest 11 is a configuration for supporting the leg of the examinee.

The link portion 100 is a configuration that can adjust the angle of the headrest (15). That is, the headrest 15 is connected to the backrest 13 and basically equipped with a function of supporting the load of the head of the examinee, while the headrest 15 is provided in the front and rear direction of the head of the examinee according to convenience during medical treatment. The angle adjustment operation is possible.

2 is a view showing the configuration of the link portion of the unit chair according to an embodiment of the present invention. As shown in Figure 2, the link portion 100, the first link member 110 fixed to the back 13 of the unit chair 10; A first link shaft 140; And a second link member having one end linked to the first link member 110 by the first link shaft 140 and rotatable about a central axis 141 of the first link shaft 140 ( 120).

Figure 3 is an exploded view showing the configuration of the link portion of the unit chair according to an embodiment of the present invention. 3, the central axis 141 of the first link shaft 140 is shown. Thus, by rotating the second link portion 120 around the central axis 141 of the first link shaft 140, it is possible to move the head of the examinee forward or straighten the head.

4 is a view showing the configuration of the first link shaft 140 according to an embodiment of the present invention. 3 and 4, a plurality of first ratchet grooves arranged annularly around a central axis 141 of the first link shaft 140 on one surface of the first link shaft 140 ( 142) is formed, the second link member 120, the first elastic member 121; Arranged in an annular shape, supported by the first elastic member 121, and fastened to the first ratchet groove 142 by the restoring force of the first elastic member 121, of the second link member 120. A plurality of first pins 122 preventing rotation in one direction; And when external force is applied, release the fastening of the first ratchet groove 142 and the first pin 122 by transmitting the external force to the elastic member, and rotate in both directions of the second link member 120. It may include a release unit 125 to enable.

The first link shaft 140 may be fixed to the first link member 110 through the first key 143.

Figure 4 (a) is a front view of the first link shaft 140, Figure 4 (b) is a right side view of the second link shaft 140, Figure 4 (c) is a section shown in Figure 4 (b) It is a sectional view of A-A '. 4 (b), a plurality of first ratchet grooves 142 may be arranged in an annular shape on one surface of the first link shaft 140. The center of the annular arrangement is preferably the central axis 141 of the first link shaft 140.

More preferably, the first ratchet groove 142 is arranged at an equal angle around the central axis 141.

5 is a view showing a fastening state of the first pin and the first link shaft according to an embodiment of the present invention. As such, each of the first ratchet grooves 142 is inclined on one side (the 'B' direction in FIG. 5), and vertical or the first pin 122 on the other side (the 'A' direction in FIG. 5). It is desirable to have a predetermined shape that can restrain the motion of).

According to the fastening structure of the first ratchet groove 142 and the first pin 122 including such a unidirectional slope, the first pin 122 is to prevent rotation of the second link member 120 in one direction. It is possible. In other words, when the head of the examinee tries to extend to the rear rather than the front, this means that the second link member 120 should be rotated in the reverse direction, but the first pin 122 and the first ratchet groove ( Due to the fastening state of 141), since the movement of the first pin 122 in the direction of 'A' in FIG. 5 is impossible, the reverse rotation is impossible. Accordingly, the first pin 122 functions to prevent rotation of the second link member 120 in one direction corresponding to the reverse direction.

In addition, a plurality of first pins 122 are also arranged in an annular shape, so that a plurality of pieces can be fastened to the first ratchet groove 142, so that the force applied to the fastened parts is distributed, thereby improving durability of parts. have. It is preferable that the first pin 122 is also annularly arranged at an equal angle around the central axis 141 like the first ratchet groove 141.

In addition, the number of the first pin 122 is preferably a factor of the number of the first ratchet groove (141). In this way, by configuring such that the relationship between the drainage and the divisor, many of the individual pins of the plurality of first pins 122 can be fastened to the first ratchet groove 142, and the number of the first ratchet grooves 141 is large. By utilizing the configuration of the individual grooves, it is possible to adjust the rotation angle of the fine second link member.

3 and 4, the first pin 122 is preferably composed of six individual pins, and the first ratchet groove 142 is composed of twelve individual grooves. This has the effect that the support strength of the fastening part of the pin and the ratchet is improved, and the durability is improved as compared to the general ratchet groove using one clamp.

In addition, as shown in FIG. 3, when the user applies an external force, the release unit 125 transmits the external force to the first elastic member 121 to deform the first elastic member 121 to And a configuration for releasing the fastening state of the ratchet groove 142 and the first pin 122. The release unit 126 may be directly bound to the first elastic member 121, but as illustrated in FIG. 3, external force is applied to the first elastic member 121 via the first pin 122. It may be composed of a connection structure that delivers.

On the other hand, as shown in Figure 2, the unit chair 10, the second link shaft 150; And a headrest 15 is fixed to one surface, and the second link shaft 150 is connected to the opposite end of the one end of the second link member 120 by the second link shaft 150. A third link member 130 rotatable about the central axis 151 may be further included.

The second link shaft 150 may be fixed to the third link member 130 through the second key 153.

In addition, the second link member 120 further includes a first body 128 and a second body 129 that are mutually assembled, the first pin 122, the first elastic member 121, the second pin (124), it is preferable to accommodate the second elastic member 123 and the operating member 127, and supports the button 126, the first link shaft 140 and the second link shaft 150.

Through the configuration in which the third link member 130 and the second link shaft 150 are added as described above, it is possible to more precisely control the posture of the head of the examinee by implementing a two-joint type headrest. That is, it is possible to implement a posture advantageous for medical treatment by simultaneously adjusting the height and angle of the head.

In addition, a plurality of grooves (not shown) arranged annularly around the central axis 151 of the second link shaft 150 is formed on one surface of the second link shaft 150, and the second link member is , The second elastic member 123; And a plurality of second pins 124 arranged in an annular shape, supported by the second elastic member 123, and fastened to the groove by the restoring force of the second elastic member 123, and When the external force is applied, the release unit 125 transfers the external force to the second elastic member 123 to release the fastening of the groove and the second pin 124, and the third link member ( It is desirable to enable rotation in both directions of 130).

Meanwhile, when the groove (not shown) is a second ratchet groove (not shown), and the second pin 124 is fastened to the second ratchet groove (not shown), the third link member 130 It can be configured to prevent rotation in one direction. In this way, by further including a fastening configuration of the second ratchet groove (not shown) and the second pin 123, it is possible to more conveniently adjust the posture of the head of the patient.

The shape of the second ratchet groove (not shown) and the second pin 123 may be configured with the same mechanism with reference to the shapes of the first ratchet groove 142 and the first pin 122.

In addition, when the central axis 141 of the first link shaft 140 and the central axis 151 of the second link shaft 150 are parallel, and external force is not applied to the release unit 125, the The direction in which the second link member 120 is rotatable and the direction in which the third link member 130 is rotatable are preferably opposite to each other.

As described above, by configuring the rotation directions opposite to each other, the posture of the head of the examinee can be more conveniently adjusted. That is, it is easy to lean the second link member 120 forward to increase the height of the head, and then adjust the face of the examinee at an angle suitable for treatment by twisting the third link member 130 toward the rear of the head of the examinee. Becomes

In addition, the second pin 124 may be configured to prevent rotation of the third link member 130 in both directions when fastened to the groove. The groove (not shown) may take the form of a general groove that can accommodate the second pin 123. In this case, when an external force is not applied to the release unit 125, since the fastening of the second pin and the groove (not shown) is not released, the second link member 120 of the third link member 130 ) Relative rotational motion is constrained in both directions.

6 is a view showing the configuration of the release unit 125 and the pin according to an embodiment of the present invention. 6, the release unit 125 includes a button unit 126 to which the external force is applied; And an operating member 127 receiving the external force from the button portion 126 and simultaneously transmitting the external force to the first elastic member 121 and the second elastic member 123.

A roller (not shown) or a ball (not shown) may be formed at each end of the first pin 122 that is fastened to the first ratchet 142. In this way, by introducing the rolling element to the end of the first pin 122, it is possible to more easily rotate the second link member 120. The roller (not shown) or ball (not shown) configuration is preferably applied to the second pin 124 in the same way.

Meanwhile, terms such as “first”, “second”, “third”, and “fourth” in the specification and claims are used to distinguish between similar elements, but not necessarily in a specific sequence or Used to describe the order of occurrence. It will be understood that the terms so used are compatible under appropriate circumstances so that the embodiments of the invention described herein can operate in sequences other than those shown or described herein, for example. Likewise, where the method is described as including a series of steps, the order of such steps presented herein is not necessarily the order in which such steps may be performed, and any described steps may be omitted and / or here Any other steps not described may be added to the method.

The terms "left", "right", "front", "back", "upper", "bottom", "top", "bottom", etc. in this specification and claims are used for explanation and must be It is not intended to describe a constant relative position. It will be understood that the terminology used as such is compatible under appropriate circumstances so that embodiments of the invention described herein may operate in other directions than illustrated or described herein, for example. The term "connected" as used herein is defined as being connected directly or indirectly in an electrical or non-electrical manner. Objects described herein as “adjacent” to one another may be physically in contact with each other, close to each other, or in the same general scope or area as they are appropriate to the context in which the phrases are used. The presence of the phrase "in one embodiment" here does not necessarily mean the same embodiment.

Also, in this specification and claims, reference to various variations of the expressions such as 'connected', 'connected', 'concluded', 'concluded', 'combined', 'combined', etc. is directly related to other components. It is used in a sense that includes being connected to or indirectly through other components.

In addition, the suffixes "module" and "part" for components used in the present specification are given or mixed only considering the ease of writing the specification, and do not have a meaning or a role distinguished from each other by itself.

In addition, the terms used in this specification are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, 'comprise' and / or 'comprising' refers to the components, steps, operations and / or elements mentioned above, the presence of one or more other components, steps, operations and / or elements. Or do not exclude additions.

In addition, although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims. In addition, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical idea or prospect of the present invention.

Claims

In the unit chair including a link portion that can adjust the angle of the headrest,

The link portion,

A first link member fixed to the back of the unit chair;

A first link shaft; And

One end is connected to the first link member by the first link shaft and includes a second link member rotatable about a central axis of the first link shaft,

A plurality of first ratchet grooves arranged in an annular shape around a central axis of the first link shaft are formed on one surface of the first link shaft,

The second link member,

A first elastic member;

A plurality of first pins arranged in an annular shape, supported by the first elastic member, and fastened to the first ratchet groove by the restoring force of the first elastic member to prevent rotation of the second link member in one direction; And

When an external force is applied, it characterized in that it comprises a release portion for transmitting the external force to the elastic member to release the fastening of the first ratchet groove and the first pin, and to enable rotation of the second link member in both directions. Unit chair to be made.
According to claim 1,

A second link shaft; And

A third link member fixed to one surface and connected to the opposite end of the one end of the second link member by the second link shaft, the third link member rotatable about a central axis of the second link shaft Included unit chair.
According to claim 2,

A plurality of grooves arranged in an annular shape around a central axis of the second link shaft is formed on one surface of the second link shaft,

The second link member,

A second elastic member; And

Further comprising a plurality of second pins arranged in an annular shape, supported by the second elastic member, and fastened to the groove by the restoring force of the second elastic member,

The release unit,

When the external force is applied, the unit chair, characterized in that by transmitting the external force to the second elastic member to release the fastening of the groove and the second pin, it is possible to rotate in both directions of the third link member .
The method of claim 3,

The groove is a second ratchet groove,

When the second pin is fastened to the second ratchet groove, the unit chair is characterized in that to prevent rotation of the third link member in one direction.
The method of claim 4,

The central axis of the first link shaft and the central axis of the second link shaft are parallel,

When an external force is not applied to the releasing portion, a direction in which the second link member is rotatable and a direction in which the third link member is rotatable are opposite to each other.
The method of claim 3,

When the second pin is fastened to the groove, the unit chair, characterized in that to prevent rotation of the third link member in both directions.
The method of claim 3,

The release unit,

A button unit to which the external force is applied; And

And an operating member receiving the external force from the button portion and simultaneously transmitting the external force to the first elastic member and the second elastic member.
According to claim 1,

A unit chair, characterized in that a roller or a ball is formed at each end of the first pin fastened to the first ratchet.