KR200439354Y1 - Cep The simple desk frame structure which is established in the chair back of chair - Google Patents

Abstract

The present invention relates to a simple desk frame installed on the back of the folding chair, and more particularly, a desk frame having a track-shaped insertion groove into which the simple desk is assembled and a shelf on which the book or a user can bring a book. A shelf coupling hole capable of coupling a joint, a joint portion coupled to an upper back frame frame at the desk frame end, a disc insertion groove into which three discs are inserted in the joint portion, and a hinge bolt at the center of the disc in the disc insertion groove. A pin hole into which a braking pin is inserted at a predetermined interval spaced from the hinge hole to be inserted and the hinge hole, and a latch groove formed at an arbitrary position on the outer peripheral surface of the disk. Inside the back frame is a bolt and nut for coupling the latch to the back frame, and the latch is configured of a torsion spring installed so that the end of the ratchet in the ratchet groove elastically detachable.

Folding table, folding desk frame, desk frame, back frame, joint

Description

Simple desk frame structure which is established in the chair back of chair}

      1 is a perspective view of a simple desk frame of the present invention.

      Figure 2 is an exploded perspective view of a simple desk frame of the present invention.

      Figure 3 is a cross-sectional view of the simple desk frame of the present invention.

      Figure 4 is a longitudinal cross-sectional view of the simplified desk frame of the present invention is folded.

      5 is an enlarged cross-sectional view of a joint part that is a main part of the present invention.

      6 is a cross-sectional view of the working state of the present invention,

          (a) shows the latch in the latch groove with the desk frame horizontally placed.

              Fitted,

         (b) indicates that the latch in the latch groove was

             Leaving,

         (c) shows the center of the groove without the latch groove when the disc rotates counterclockwise.

             Not latched by the disk,

          (d) shows both sides without latching grooves when the disc rotates counterclockwise.

              Not latched by the disk,

7 is a state of use of the present invention.

* Description of the symbols for the main parts of the drawings *

        10: folding seat 20: backrest

        30: simple desk frame 40: back frame

        41: Bolt 42: reinforcement plate

        43: bolt 44: nut

        45: torsion spring 46: latch

        47: joint piece 50: simple desk

        60: shelf 70: desk frame

        71: Inserting slot 71 'Shelf mounting hole

        72: joint 73: disk

        73a: hinge hole 73b: pin hole

        73b 'hole 74: disc insertion groove

        75: hinge bolt

       The present invention relates to a simple desk frame installed in the backrest of the folding chair, and in particular, the user can easily use when folding the simple desk frame from vertical to horizontal or horizontal to vertical. The present invention relates to a simple desk frame installed on a backrest of a folding table having a shelf for temporary storage.

       In general, the seat is automatically folded vertically until the user sits down. In particular, when the chair is used in a theater or lecture room, such as a terrace, the chair is used frequently because there is no big inconvenience for people's traffic. .

        In recent years, it is well known that a simple desk is installed on the back of a folding chair so that a person sitting in the back seat can put a book or take a simple note.

        When the lock ring disposed on the upper back is released to use the simple desk installed on the backrest of the folding chair, the simple desk vertically attached to the backrest unfolds around the hinge axis of both sides and is simplified by separate stoppers mounted on both sides of the back of the backrest. The desk is laid horizontally.

 However, there is a problem in that a simple locking ring must be installed in the center of the backrest in order to make the simple desk vertically close to the backrest as described above, and a stopper must be installed on both sides of the backrest so that the simple desk can be braked horizontally.

The present invention has been made in order to solve the above problems, the purpose is to make it easy for the user to fold the simple desk frame vertically or horizontally or horizontally to vertically, the lower desk frame The purpose of the present invention is to provide a shelf that can temporarily store objects or books brought by the user so as to expand the utilization space of the simple desk.

       The simple desk frame installed on the backrest of the folding chair for achieving the above object is divided into a desk frame and a backrest frame. The desk frame has a desk insertion groove into which a simple desk is assembled, and the desk frame has a book or an object brought by the user. Shelf joining hole for coupling the shelf that can be placed, and the joint portion is coupled to the upper back frame frame at the desk frame end, the disc insertion groove into which three discs are inserted into the joint portion, the disc insertion groove of the disc A hinge hole into which a hinge bolt is fitted in the center and a pin hole into which a brake pin is inserted at a predetermined distance from the hinge hole, a latch groove formed at an arbitrary position on the outer circumferential surface of the disc, and a ratchet is coupled to the back frame within the back frame. Bolts and nuts, and the latch end in the latch groove Is characterized in consisting of a torsion spring is installed so as to be detachable with the elastic.

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

1 is a perspective view of a simple desk frame of the present invention, Figure 2 is an exploded perspective view of the simple desk frame of the present invention, Figure 3 is a cross-sectional view of the simple desk frame of the present invention, Figure 4 is a simple desk frame of the present invention 5 is an enlarged cross-sectional view of a joint part that is a main part of the present invention, and FIG. 6 is a cross-sectional view of an operating state of the present invention, and (a) is a latch groove in a state where a desk frame is placed horizontally. The latch is engaged, (b) is the latch in the latch groove when the disk rotates clockwise, and (c) is the center of the center without the latch groove when the disk rotates counterclockwise. The latch is not latched by the disk, (d) is a state where the latch is not latched by both disks without a latch groove when the disk is rotated counterclockwise, and FIG. 7 is a state diagram of the present invention.

      As illustrated in FIGS. 1 to 7, the simple desk frame 30 attached to the backrest 20 of the folding chair 10 includes a backrest frame 40 attached to the backrest 20, a simple desk 50, and the like. The shelf 60 is partitioned into a desk frame 70 that is coupled.

     Side of the back frame 40 is coupled to the backrest 20 and the bolt 41, the lower back frame 40, the upper reinforcement plate 42, the lower portion of the torsion spring 45 is coupled to the bolt 43 is located The latch 46 is coupled to the bolt 43, and a joint connection piece 47 is formed on the upper back frame 40.

    The desk frame 70 is formed with a desk insertion groove 71 into which both ends of the simple desk 50 are inserted, and a plurality of shelves 60 are fitted at the front end of the desk insertion groove 71. A shelf coupling hole 71 ′ is formed, and a joint portion 72 is disposed at the front end of the desk frame 70.

     The joint portion 72 forms a disc insertion groove 74 into which three discs 73 are fitted. The number of discs is preferably three.

     In the center of the three disks 73, a hinge hole 73a is formed, into which the hinge bolt 75 is fitted, and a pin hole 73b into which the pin 76 is inserted at a position spaced apart from the hinge hole 73a. Although the pin hole of the center disk is formed with the long hole 73b ', the latch groove 73c is formed in the outer peripheral surfaces of the three disks 73. As shown in FIG.

      Looking at the embodiment of the present invention configured as described above are as follows.

As shown in FIG. 7, the backrest frame 40 is coupled to the backrest 20 of the folding chair 10, and the simple desk 50 and the shelf 60 are placed on the desk frame 70.

     In particular, as shown in Figure 4, the back frame 40 attached to the backrest 20 is coupled to the bolt (41).

    When the simple desk frame 30 is attached to the backrest 20 as described above and the desk frame 70 is moved upward while the desk frame 70 is placed vertically, as shown in FIG. 6A. The desk frame 70, the pin 76, and the disk 73 rotate simultaneously in the clockwise direction about the hinge bolt 75, and when the desk frame 70 is placed horizontally, a latch formed on the outer peripheral surface of the disk 73 The end of the latch 46 is fitted into the groove 73c by the elasticity of the torsion spring 45.

    As described above, when the desk frame 70 is horizontally placed, the user uses the simple desk 50 and the shelf 60, and when the desk frame 70 is to be returned to its original position, as shown in FIG. 6B. When the desk frame 70 is raised upward, the desk frame 70, the disk 73, and the pin 76 are moved simultaneously in the clockwise direction about the hinge bolt 75. At this time, the latch 46 leaves the ratchet groove 73c.

     When the disk 73 is released from the latch 46, the desk frame 70 is lowered as shown in FIG. 6C when the desk frame 70 and the pin 76 are moved around the hinge bolt 75. And the disk 73 rotates counterclockwise. At this time, by the length of the long hole 73b 'of the disk 73 disposed at the center, the disk 73 rotates later than the disk 73 on both sides by a predetermined time.

    Therefore, the latch 46 loses the braking force in a state where the latch groove 73c of the center disk 73 and the latch groove 73c of the disk 73 on both sides are staggered, so that the disk 73 is separated from the latch 46. It will rotate regardless.

    For reference, when the plurality of latch grooves 73c do not coincide with the same line, the latch 46 is not fitted into the latch groove 73c.

   Continuing to use the principle of the latch 46 as described above in Figure 6d is to return the desk frame 70 to the bottom.

As described above, the present invention is designed to be easily used by the user when the simple desk frame is folded vertically or horizontally or horizontally or vertically, and the lower desk frame temporarily stores objects or books brought by the user. Shelf can be arranged is effective to increase the utilization space of the simple desk.

Claims (1)

      In the simple desk frame 30 attached to the folding chair 10, the backrest 20, The simple desk frame 30 has a backrest frame 40 attached to the backrest 20 with a bolt 41, a desk frame 70 to which the simple desk 50 and the shelf 60 are coupled,      A reinforcing plate 42 disposed inside the backrest frame 40,     A bolt 43 penetrating the backrest frame 40 laterally;     At the center of the latch 46 fitted to the bolt 43, a torsion spring 45 is installed,     Means for supporting the lower end of the torsion spring 45 on the reinforcing plate 42,     Joint connecting piece 47 formed on the back frame 40,    The desk frame (70) has a desk insertion groove (71) into which both ends of the simple desk (50) are fitted, and the shelf (60) has a plurality of shelf coupling holes (71 ') into which the ring ends are fitted;      Joint portion 72 formed at the front end of the desk frame 70,    A disc insertion groove 74 into which three discs 73 are inserted into the joint portion 72;      A hinge hole 73a into which a hinge bolt 75 is inserted at the center of the disk 73;    In the position spaced apart from the hinge hole (73a), the disk (73) disposed at the center is a long hole (73b ') and the disk (73) on both sides is formed by a pin hole (73b), the pin 76 is assembled; A simple desk frame installed on the backrest of the folding chair, characterized in that the disk 73 has an outer circumferential surface including a latch groove 73c.

Images