KR102512904B1 - Rotating Device For Writing Table Of Chair - Google Patents

Abstract

The chair memo pad rotation device of the present invention includes a lower rotating body coupled to an opening and closing shaft protruding from a support; and an upper rotating body rotatably coupled to the lower rotating body, preferably with the lower rotating body It further includes a friction reducing plate inserted and coupled between the upper rotating body. In addition, the lower rotating body has a boss protruding from the center of the upper surface of the lower body, and a rotation guide groove formed in a semicircular shape is formed on a concentric circle around the boss to guide the rotation of the upper rotating body coupled thereto.

Description

Chair memo table rotating device {Rotating Device For Writing Table Of Chair}

The present invention relates to a chair memo pad rotation device that rotates a memo pad installed on a chair so that it can be unfolded or folded and stored.

In general, in lecture rooms, seminar rooms, churches, etc., which do not have a separate desk, lecture chairs are used that have a memo pad on the back of the chair so that a seated person sitting on a back chair can put a book or take notes.

Such lecture chairs are known in various forms, and have a structure in which a memo pad can be folded or unfolded to facilitate storage and management while increasing space utilization.

That is, when using the memo pad, the memo pad can be unfolded to put personal belongings and books on it, or to write more comfortably, and when not in use, the memo pad can be folded and stored in close contact with the backrest.

However, in this prior art, the appearance of the hinge part of the link member is exposed to the field of view, so the appearance is distracting and there is a risk of damage, and the link member, the backrest, and the memo pad may be inserted into the space formed, so that children may be injured in particular. There was a risk of going.

Accordingly, the present applicant has registered a chair that has improved the above problems as Patent No. 10-1004398. Patent No. 10-1004398 is configured to fold or unfold by rotating a memo pad extended from a chair to a support, but by locating the rotating device at the bottom of the memo pad, exposure of the view during use is avoided, and fingers, etc. This is to ensure that no interference occurs.

However, in the prior art, since the vertical rotation part and the left and right rotation part are divided in the rotating device body and configured to operate in different sockets, the device is complicated, and since the long support and the vertical rotation guide must be integrally molded and injected, the mold manufacturing unit cost increases. There was a problem.

Korean Patent Registration No. 10-1004398 (Announcement date: December 28, 2010)

In view of the above problems, an object of the present invention is to enable up and down and left and right rotation of a memo stand by using a single body of a rotating device, and to improve the ease of manufacture by simplifying the structure.

In order to achieve the above object, the chair memo pad rotating device of the present invention includes a lower rotating body coupled to an opening and closing shaft protruding from the support; and an upper rotating body rotatably coupled to the lower rotating body, Preferably, it further includes a friction reducing plate inserted and coupled between the lower rotating body and the upper rotating body.

In addition, the lower rotating body has a boss protruding from the center of the upper surface of the lower body, and a rotation guide groove formed in a semicircular shape is formed on a concentric circle around the boss to guide the rotation of the upper rotating body coupled thereto.

In addition, in the lower rotating body, an opening and closing shaft hole into which an opening and closing shaft is inserted and coupled is formed on the side surface of the lower body, and an opening and closing guide hole is also formed by simultaneously cutting the lower surface and the side surface of the lower body.

According to the present invention configured as described above, the chair memo pad rotating device of the present invention can freely unfold or fold the memo pad using only one body, and also rotates and stores the memo pad in a stowed position.

Since the chair memo pad rotating device of the present invention has a very simple structure constituting one body, it is very easy to manufacture and assemble and install.

In addition, since not only the rotation device but also the auxiliary components such as the support are designed with a simple structure, manufacturing is easy and there is an effect of reducing the occurrence of problems such as failure.

1 is a perspective view showing a state in which the memo pad is attached to the rotating device of the present invention.
Figure 2 is a perspective view showing the external form of the chair memo pad rotation device of the present invention.
Figure 3 is an exploded perspective view of the chair memo pad rotating device of the present invention viewed from the bottom.
Figure 4 is an exploded perspective view of the chair memo pad rotation device of the present invention viewed from the top.
5 is a cross-sectional view of a chair memo pad rotation device according to the present invention.
6 and 7 are rotational operation according to folding and unfolding of the memo pad by the rotating device of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the chair memo pad rotating device of the present invention will be described in detail with reference to the accompanying drawings. However, the thickness of lines or the size of components shown in the drawings may be exaggerated or reduced for convenience so that the configuration of the present invention can be more clearly understood.

Terms used for description of the present invention are terms defined in consideration of functions in the present invention. However, since these terms may be expressed in other terms according to the intention or custom of a designer or user, practical definitions of these terms used in the present invention should be made in consideration of the contents described throughout this specification.

In addition, directionality such as 'top', 'bottom', 'front', 'back', 'front', 'back', 'left', 'right', 'front end', 'rear end' used in the description of the present invention Terms are relative to the orientation of the disclosed figure(s). However, since components of embodiments of the present invention may be positioned in various orientations, directional terms are used for illustrative purposes and are not limiting.

In the case where it is described that the components used in the present invention are 'connected', 'coupled' or 'fastened' to each other, the case where they are formed integrally and inseparably and the case where they are made by an indirect method through intermediate components are also included. should be understood as

Further, in the description of the present invention, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

Hereinafter, a preferred embodiment of a chair memo pad rotating device according to the present invention will be described with reference to the accompanying drawings.

1, 6 and 7 show a state in which the memo pad 200 is coupled to the rotating device 100 of this embodiment.

As shown, the chair of this embodiment has a seat plate configured to allow a user to sit on it, a backrest provided at an appropriate angle at the rear of the seat plate to support the user's back, and a leg coupled to the lower side of the seat plate to support the seat plate, as in a conventional chair. It consists of mutual assembly. In addition, a support 300 for installing a rotating device 100 is coupled to one leg so that the memo pad 200 can rotate.

In this embodiment, for convenience of explanation, the part with the backrest is referred to as the rear, and the opposite direction is referred to as the front.

As shown in FIG. 1, the chair to which this embodiment is applied includes a support 300 installed on one side of a leg, a rotating device 100 coupled to an end of the support 300 and rotating in a vertical or left-right direction, and It is configured to include a bracket 50 coupled to the upper surface of the rotating device 100 and attached to the lower surface of the memo pad 200 at the same time.

As shown in Figure 7. The support 300 is installed upward in an oblique direction on one leg.

That is, the lower end of the support 300 is fixedly coupled to the leg of the chair using a fixing member (not shown) such as a bolt, and the installation unit 310 is integrally injection molded at the upper end. In addition, an opening/closing shaft 320 protrudes from the end of the installation part 310, and a rotating device 100 described later can be inserted and coupled thereto.

Referring to FIGS. 2 to 5 , the rotating device 100 will be described.

The rotating device 100 is composed of a lower rotating body 10 and an upper rotating body 30 coupled to each other and a friction reducing plate 20 inserted between the lower rotating body 10 and the upper rotating body 30. do.

The lower rotating body 10 has a cylindrical lower body 11, and a boss 14 protrudes from the center of the upper surface of the lower body 11. The boss is inserted into and coupled to an upper rotary body 30 to be described later, and a washer protrusion 15 into which a washer 38 can be inserted is formed on the upper surface of the boss 14, and a fixing bolt ( A fixing bolt hole 16 capable of fastening 39) is formed.

Therefore, when the boss 14 is passed through the boss insertion hole 35 formed at the center of the upper body 31 to be described later and the fixing bolt 39 is fastened to the fixing bolt hole 16, the upper rotating body 30 The lower rotating body 10 is coupled.

In addition, a rotation guide groove 17 formed in a semicircular shape is formed on a concentric circle around the boss 14 and guides the rotation of the upper rotating body 30 coupled thereto.

In addition, on the upper surface of the lower body 11, a circular groove is dug outward of the rotation guide groove 17 to form a step. The deepest groove surface becomes the second friction surface 19, and the upper step surface is the first friction surface. It becomes surface (18).

In addition, an opening/closing shaft hole 12 into which the opening/closing shaft 320 formed at the end of the installation portion of the support 300 is inserted and coupled is formed on the side surface of the lower body 11.

In addition, the opening and closing guide hole 13 is also formed by simultaneously cutting the lower surface and the side surface of the lower body 11, and the opening and closing guide hole 13 is formed to communicate with the opening and closing shaft hole 12.

Therefore, as shown in FIGS. 1 and 5, when the opening and closing shaft 320 of the support 300 is inserted into the opening and closing hole 12, the guide bolt 40 is coupled to the opening and closing hole 12 through the opening and closing guide hole 13 can make it

Therefore, as shown in FIG. 5, the rotating device 100 can be rotated around the opening/closing shaft 320, and at this time, the guide bolt 40 is blocked by the inner wall of the opening/closing guide hole 13 to center the opening/closing shaft 320. to limit the amount of rotation.

The upper rotating body 30 is provided with a substantially cylindrical upper body 31 so as to correspond to the lower rotating body 10, and a boss insertion hole 35 is formed at the center of the upper body 31 to insert the boss. The boss 14 penetrates through the ball 35, and the upper rotating body 30 is coupled to the lower rotating body 10.

In addition, a guide protrusion 33 is protruded from the lower surface of the upper rotating body 30 facing the lower rotating body 10, and is fitted into the rotation guide groove 17 when the upper rotating body 30 rotates up and down to rotate. do.

At this time, when the guide protrusions 33 reach both ends of the semicircular rotation guide groove 17, the guide protrusions 33 also function as stoppers capable of preventing further rotation.

A positioning protrusion 34 protrudes from the upper surface of the upper body 31, and a plurality of bolt holes 36 for coupling with the bracket 50 are formed.

The positioning protrusion 34 is formed with a positioning hole (not shown) of the bracket 50, so that when the upper rotating body 30 is coupled to the bracket, they are fitted to each other. When fitted in this way, the upper rotating body 30 The position of the guide protrusion 33 formed on the lower surface of the can always be set constantly.

Meanwhile, a friction reducing plate 20 is interposed and coupled between the upper rotating body 30 and the lower rotating body 10 .

The body 21 of the friction reducing plate 20 is made of an annular ring-shaped thin plate. At this time, the first protrusion 22 and the second protrusion 23 protrude in an annular shape on the lower surface, the first protrusion 22 on the first friction surface 18, and the second protrusion 23 on the second Each comes into contact with the friction surface 19.

Therefore, when the upper rotating body 30 and the lower rotating body 10 rotate relative to each other, the friction areas between the first protrusion 22 and the first friction surface 18 and the second protrusion 23 and the second friction surface 19 Since is much smaller than the total area of the annular ring shape, the frictional force can be reduced. Accordingly, the relative rotation of the upper rotating body 30 and the lower rotating body 10 becomes smooth and frictional noise is also reduced.

The bracket 50 is coupled to the upper surface of the rotating device 100 using a fixing member such as a bolt. In addition, the memo stand 200 is installed on the upper surface of the bracket 50 using bolts or the like.

Hereinafter, an operation of unfolding or folding the memo pad 200 by the rotation device 100 according to the present embodiment will be described with reference to FIGS. 6 and 7 .

First, as shown in FIG. 6, when the memo pad 200 is lifted up or down, the body of the rotating device 100 rotates around the opening and closing shaft 320 described in FIGS. 1 and 5, and the opening and closing shaft (320) The guide bolt 40 installed on the side also rotates relatively within the opening and closing guide hole 13. At this time, the relative rotation is stopped when the guide bolt 40 is blocked on the inner surface of the opening and closing guide hole. As shown in FIG. 1, when the guide bolt 40 comes into contact with the central inner surface of the opening and closing guide ball and is blocked, the memo pad 200 is leveled, and the memo pad is stopped in this state.

Next, when the memo pad 200 is rotated backward (clockwise) as shown in FIG. 7 in a state in which the memo pad 200 is lifted upward, the memo pad 200 can be arranged in a lower storage position.

That is, in a state in which the memo pad 200 is lifted, when the user rotates the memo pad backward, the upper rotating body 30 coupled to the support 300 has a guide protrusion 33 as shown in FIG. (17) is rotated in the direction of the arrow around the boss 14, and while being blocked at the end of the rotation guide groove 17, the upper rotating body 30 is restricted from further rotation. This rotation restriction state is a state in which the memo pad 200 is turned on to the lower storage position.

Meanwhile, in order to use the memo pad 200 again, the memo pad 200 may be returned to its original position in the reverse order mentioned above, and then unfolded horizontally and used.

Those skilled in the art to which the present invention pertains can improve or change the technical idea of the present invention in various forms. Therefore, the embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical spirit of the present invention. That is, if the improvement and change are easy to those skilled in the art, they will fall within the protection scope of the present invention.

100: rotation device 200: memo pad
300: support 320: opening and closing shaft
10: lower rotating body 12: opening and closing shaft hole
13: opening and closing guide ball 17: rotation guide groove
20: friction reduction plate 30: upper rotating body
33: guide protrusion 34: positioning protrusion
40: guide bolt 50: bracket

Claims (4)

A lower rotating body 10 coupled to the opening and closing shaft 320 protruding from the support 300, an upper rotating body 30 coupled to the lower rotating body 10 and capable of relative rotation, and the lower rotating body 10 In the chair memo pad rotating device having a friction reducing plate 20 inserted between the upper rotating body 30,

The friction reducing plate 20 is formed of a body 21 formed of an annular ring-shaped thin plate, and an annularly protruding protrusion is formed on the lower surface of the body 21,
The lower rotating body 10 is provided with a cylindrical lower body 11, but a friction surface is formed in a circular groove shape on the upper surface of the lower body 11,
The chair memo pad rotating device, characterized in that the protrusion of the friction reducing plate 20 is configured to contact the friction surface of the lower rotating body 10.
delete According to claim 1
The lower rotating body 10 is
A boss 14 protrudes from the center of the upper surface of the lower body 11,
A rotation guide groove 17 having a semicircular shape is formed on a concentric circle around the boss 14, and guides the rotation of the upper rotating body 30 coupled thereto.
According to claim 1
The lower rotating body 10,
An opening and closing shaft hole 12 into which the opening and closing shaft 320 is inserted and coupled is formed on the side of the lower body 11,
A chair memo pad rotating device characterized in that the opening and closing guide hole 13 is also formed by simultaneously cutting the lower surface and the side surface of the lower body 11.

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