CN201602421U

CN201602421U - Movable writing board for chair

Info

Publication number: CN201602421U
Application number: CN200920179654XU
Authority: CN
Inventors: 许传福
Original assignee: HEFU INTERNATIONAL CO Ltd
Current assignee: HEFU INTERNATIONAL CO Ltd
Priority date: 2009-10-15
Filing date: 2009-10-15
Publication date: 2010-10-13
Anticipated expiration: 2019-10-15

Abstract

The utility model discloses a movable writing board for a chair which comprises a desk plate, a locating plate and an arm-rest head, wherein the front surface of the desk plate can be used for reading or writing, the back surface thereof is provided with an elbow joint capable of pivoting by 90 degrees, an arc guide rail is arranged on the elbow joint and provided with a first port and a second port which are slantwise opposite to each other and communicated with each other through an arc groove; the front surface of the locating plate is provided with a shaft pin which is inserted into the arc guide rail so as to lead the elbow joint to be attached on the front surface of the locating plate, and a convex pivot is molded on the back surface of the locating plate; and the arm-rest head can be assembled at the front end of an arm rest of the chair and is provided with a pivot hole penetrating through the left side and the right side of the arm-rest head, the pivot penetrates through the pivot hole so as to lead the locating plate to be attached at the right side of the arm-rest head, and then the arm-rest head is screwed with the elbow joint by a screw rod which sequentially penetrates through the pivot hole and the pivot of the locating plate from the left side of the arm-rest head, therefore, the desk plate is assembled at the right side of the arm-rest head. The desk plate dose not sway randomly when being located at the side of the arm rest, and the oblique amplitude of the desk plate relative to the arm-rest head can be changed so as to adapt to the sitting or writing posture of a user.

Description

The movable board of chair

Technical field

The utility model relates to a kind of board, relates in particular to the movable board of a kind of chair.

Background technology

Traditional classroom education epoch, proper alignment desk, chair in the space, classroom, the great number of disciples position of on tablet chair, settling down, and utilize desk to study teaching materials carefully, write report or the respite of lying prone on table, and even to this day, the desk of two-piece type, chair have been equipped with for the chair of reading and writing with extension leaf behind the chair back or by the handrail by one mostly and have replaced in the past, this appearance with movable board seat, solved two-piece type desk in the past, chair deposit, carry and arrangement aspect puzzlement.

With regard to regard to side tablet-style seat, general structure is that board is assembled in by the pivot swinging mechanism on the handrail of seat one side, utilizes the mode of pivot pendulum turnover again, makes board can be stapled to the handrail top, relies on board to be read and write in order to the user;

Though seat applications pivot swinging mechanism is pivoted board and handrail, and can between handrail top and side, activity turn down, yet, when the board vertical side is hung on the armrest side, board is the gap because of leaving across the pivot swinging mechanism between handrail, and the user is when being sitting on the seat, also usually custom just rides over arm on handrail and that road areolar, perhaps finger reaches in the gap unconsciously, if the user adjusts sitting posture on the seat, perhaps thigh touches the board that side is hung, the pivot swinging mechanism can be because of the traction of board pivot pendulum and board is produced rock slightly, in case the board that side is hung rocks the variation that can cause gap length on the handrail side, and ride over the arm on the gap or the finger that stretches in the gap just may be clamped because of the flip-flop in gap, even may be between the moment of desperation because of the angle of taking out hand not to causing finger folding wound, the situation of arm lacerated wound.

This shows, though have the shortcoming that the seat of movable board has solved two-piece type desk, chair, bring the convenience in people's use, in the bascule design of its board, but there is the potential risk that causes user's unexpected injury easily, necessity of further being improved is arranged in fact.

The utility model content

Technical problem underlying to be solved in the utility model is, overcome the above-mentioned defective that prior art exists, and provide a kind of chair movable board, block the design in elbow joint pivot pendulum path with location-plate, can not rock arbitrarily when making table be positioned at the handrail side, avoid the user to lean against arm on the handrail, or the accident that crushes because of rocking of table of the finger that stretches into handrail and board gap carelessly, utilize adjustable pushing block and movable pushing block guard design on the elbow joint, the magnitude of inclination that can change the relative head of table caters to user's sitting posture or writes and postures.

For reaching aforementioned purpose, the utility model comprises:

One table, this table front can be provided with one in reverse side and can do the elbow joint that 90 degree pivots are put for the usefulness of reading or writing, and has a curved arc guide rail on this elbow joint, this curved arc guide rail has oblique relative first port and one second port, and is interconnected with an arc groove;

One location-plate is provided with a pivot pin in the front, this pivot pin inserts this curved arc guide rail makes this elbow joint be affixed on the location-plate front, and this location-plate is in the pivot of negative shape one outer gibbosity;

One can be assembled in the head of armrest front end, this head has a pivot hole of running through and arranged on left and right sides, this pivot hole for this pivot establish into and make this location-plate be affixed on the right side of head, this head passes the pivot of pivot hole, location-plate by the left side in regular turn with a screw rod again and screws togather with elbow joint, whereby this table is mounted on the right side of head;

The pull-up table makes elbow joint offset with second port and the pivot pin of curved arc guide rail, and drives upwards pivot of the relative head of this location-plate, makes table turn over to the head end face by the pivot pendulum of elbow joint; Put down table elbow joint is offseted with first port and the pivot pin of curved arc guide rail, and drive the relative head of this location-plate and pivot downwards, make table place the right side of head, and location-plate blocks the pivot pendulum path of elbow joint table can not rocked arbitrarily.

Technology contents of the present utility model can further comprise:

One, aforesaid this elbow joint has the last pivot piece of being located at the table reverse side, one and the following pivot piece that screws togather of head, and this time pivot piece is offered this curved arc guide rail, and each is interlaced and wear an axostylus axostyle and articulate each other with an end for pivot piece and this time pivot piece on this;

The pull-up table should be gone up pivot piece this time pivot piece pivot pendulum and table is turned over to this head end face relatively, put down that this location-plate of table then blocks the pivot piece and following pivot piece articulated section can not rocked table arbitrarily.

Two, the aforesaid pivot piece of should going up is established with reverse side and table group, be provided with a pedestal in the front, these pedestal central authorities have a groove, spiral shell is established a pushing block in this groove, and utilize the gap between pushing block and groove on pushing block, to be covered with a pushing block guard shield, this pedestal is covered with a housing outward, and this corresponding pushing block guard shield of housing central authorities offers one for its elongated slot that passes;

Adjust the degree of depth that pushing block is screwed into groove can the relative housing of related change pushing block guard shield from the outstanding degree of elongated slot, and support the pivot pivot angle degree of conversion elbow joint and then the amplitude of the relative head inclination of fine setting table with the subsides of pushing block guard shield and head end face.

Three, aforesaid this location-plate generally is long slab figure sample and has head, tail two ends, the plate body between head, the tail end is formed a backstop section, and help the lining of pivot in this pivot sheathed;

When table was positioned at the head end face, the backstop section of this location-plate was parallel with head; When this table placed the head right side, the backstop section of this location-plate was vertical with head, and blocked the pivot pendulum path of this elbow joint.

Four, aforesaid table is established a gripper shoe in reverse side elder generation spiral shell, and this gripper shoe offers one and holds mouth, establishes this elbow joint with this appearance mouthful group.

Be with, improvement of the present utility model is:

One, blocks the design in elbow joint pivot pendulum path with location-plate, can not rock arbitrarily when making table be positioned at the handrail side, avoid the user to lean against arm on the handrail, or stretch into the accident that the finger in handrail and board gap crushes because of rocking of table carelessly.

Two, utilize adjustable pushing block and movable pushing block guard design on the elbow joint, the magnitude of inclination that can change the relative head of table caters to user's sitting posture or writes and postures.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the perspective exploded view of the utility model chair with movable board.

Fig. 2 is the utility model elbow joint perspective exploded view.

Fig. 3 is the perspective exploded view of the utility model and seat.

Fig. 4 is the stereoscopic schematic diagram that the utility model is positioned at the armrest side.

Fig. 5 be the utility model when being positioned at the armrest side elbow joint and location-plate concern schematic diagram.

Fig. 6, Fig. 8 are the utility model table pivot configuration state schematic diagrames in when pendulum that makes progress.

Fig. 7, Fig. 9 be the utility model when Fig. 6, Fig. 8 state elbow joint and location-plate concern schematic diagram.

Figure 10 is the stereoscopic schematic diagram that the utility model is positioned at the armrest end face.

Figure 11 be the utility model when being positioned at the armrest end face elbow joint and location-plate concern schematic diagram.

Configuration state schematic diagram when Figure 12 is the downward pivot of the utility model table pendulum.

Figure 13 be the utility model when the 12 figure state elbow joint and location-plate concern schematic diagram.

Figure 14, Figure 15 are that the utility model is adjusted the view that pushing block changes the table magnitude of inclination.

The number in the figure explanation:

Table 1 gripper shoe 10 is held mouth 101

Pivot piece 20 pedestals 201 on the elbow joint 2

Groove 2011 pushing blocks 202 pushing block guard shields 203

2041 times pivot pieces 21 of housing 204 elongated slots

Curved arc guide rail 211 first ports 2,111 second ports 2112

Arc groove 2113 pivot ears 22 axostylus axostyles 23

Location-plate 3 backstop sections 30 pivot pins 31

321 of pivot 32 linings, tail end A, B

Head 4 pivot holes 40 screw rods 41

Armrest 5

The specific embodiment

The utility model is the relevant movable board of a kind of chair, and present embodiment is to be illustrative examples with side tablet-style seat, and it is extremely shown in Figure 4 please to consult Fig. 1 earlier, is to comprise in armrest 5 arranged outside in present embodiment:

One table 1, this table 1 front can be for the usefulness of reading or writing, and be to establish a gripper shoe 10 in reverse side elder generation spiral shell, this gripper shoe 10 offers one and holds mouth 101, establish one with 101 groups in this appearance mouth and can do the elbow joint 2 that 90 degree pivots are put, this elbow joint 2 has on one pivot piece 20 and pivot piece 21 once, it is relative with the gripper shoe 10 of table 1 reverse side with reverse side to go up pivot piece 20, and utilize spiral shell spare to be locked in this appearance mouth 101, should go up pivot piece 20 and be provided with a pedestal 201 in the front, these pedestal 201 central authorities have a groove 2011, spiral shell is established a pushing block 202 in this groove 2011, and utilize the gap of 2011 of pushing block 202 and grooves on pushing block 202, to be covered with a pushing block guard shield 203, these pedestal 201 outer housings 204 that are covered with, these housing 204 central corresponding pushing block guard shields 203 offer one for its elongated slot that passes 2041, have a curved arc guide rail 211 on this time pivot piece 21, this curved arc guide rail 211 has oblique relative first port 2111 and one second port 2112, and be interconnected with an arc groove 2113, on this pivot piece 20 and this time pivot piece 21 each to form plural pivot ear 22 with an end interlaced and wear an axostylus axostyle 23 and pivot joint each other;

One location-plate 3, this location-plate 3 generally is long slab figure sample and the plate body that has between head, tail ends A, B, tail end A, the B forms a backstop section 30, and be provided with a pivot pin 31 in the front, this pivot pin 31 inserts this curved arc guide rail 211 makes this elbow joint 2 be affixed on location-plate 3 fronts, and this location-plate 3 is in the pivot 32 of negative shape one outer gibbosity, and helps the lining 321 of pivot in this pivot 32 sheathed one;

One can be assembled in the head 4 of armrest 5 front ends, this head 4 has a pivot hole 40 of running through and arranged on left and right sides, this pivot hole 40 for these pivots 32 establish into and make this location-plate 3 be affixed on the right side of head 4, this head 4 passes the pivot 32 of pivot hole 40, location-plate 3 by the left side in regular turn with a screw rod 41 again and screws togather with the following pivot piece 21 of elbow joint 2, whereby this table 1 is mounted on the right side of head 4, makes the utility model side be hung on armrest 5 sides;

To shown in Figure 13, when not using the utility model, as Fig. 4, Fig. 5, this table 1 places head 4 right sides referring again to Fig. 4, and this moment, the backstop section 30 of this location-plate 3 was vertical with head 4, and blocks pivot ear 22 articulated sections of pivot piece 20 and following pivot piece 21; When using the utility model, as Fig. 6, Fig. 7, pull-up table 1 makes upwards pivot pendulum of elbow joint 2 first relative positioning plates 3,211 on the curved arc guide rail of this time pivot piece 21 changes pivot pin 31 with second port 2112 and location-plate 3 offset (arc groove 2113 can relatively move for pivot pin 31) with pivot pendulum upwards from first port 2111, as Fig. 8, Fig. 9, utilize second port 2112 and pivot pin 31 to offset again and drive upwards pivot of these location-plate 3 relative heads 4, as Figure 10, Figure 11, doing 90 degree pivot pendulum by 20 relative this time pivot pieces 21 of pivot piece on this turns over to this head 4 end faces table 1, when this table 1 was positioned at head 4 end faces, the backstop section 30 of this location-plate 3 was positioned at pivot piece 21 sides and parallel with head 4 down;

Otherwise, when the utility model is playbacked, as Figure 12, Figure 13, put down table 1 and make elbow joint 2 first relative positioning plate 3 downward pivot pendulum, 211 on the curved arc guide rail of this time pivot piece 21 changes pivot pin 31 with first port 2111 and location-plate 3 offset (arc groove 2113 can relatively move for pivot pin 31) with downward pivot pendulum from second port 2112, as Fig. 4, Fig. 5, utilize first port 2111 and pivot pin 31 to offset again to drive these location-plate 3 relative heads 4 and pivot downwards, make table 1 place the right side of head 4, and location-plate 3 blocks pivot ear 22 articulated sections of pivot piece 20 and following pivot piece 21 again, and the pivot pendulum path that utilizes location-plate 3 to block elbow joint 2 can not rocked table 1 arbitrarily.

Secondly, the utility model can be adjusted the degree of depth that pushing block 202 is screwed into groove 2011, the degree that related change pushing block guard shield 203 relative housings 204 are given prominence to from elongated slot 2041, and support the pivot pivot angle degree of conversion elbow joint 2 with the pushing block guard shield 203 and the subsides of head 4 end faces, and then the amplitude of fine setting table 1 relative head 4 inclinations, please refer to Figure 14 and shown in Figure 15, when table 1 turns over to this head 4 end faces, utilization screws spiral shell spare and adjusts pushing block 202 and move to groove 2011 openings, the pushing block 202 that moves to groove 2011 openings can relatedly push pushing block guard shield 203 relative housings 204 outwards outstanding from elongated slot 2041, support with the subsides of head 4 end faces with the pushing block guard shield 203 that is pushed out, last pivot piece 20 then can be a little by the top from and change pivot pivot angle degree with following pivot piece 21, and then finely tune table 1 and incline and be attached on the head 4.

From the above, the utility model is used the curved arc guide rail 211 design drive location-plates 3 of elbow joint 2 and is done two-period form pivot pendulum, make table 1 in armrest 5 end faces or the movable turnover of side, and block the design in elbow joint 2 pivots pendulum path with location-plate 3, can not rock arbitrarily when making table 1 be positioned at armrest 5 sides, avoid the user to lean against arm on the handrail, or the accident that crushes because of rocking of table 1 of the finger that stretches into handrail and board gap carelessly, and, the utility model utilizes

adjustable pushing block

202 and 203 designs of movable pushing block guard shield on the elbow joint 2, and the magnitude of inclination that can change table 1 relative head 4 caters to user's sitting posture or writes and postures.

Claims

1. the movable board of chair is characterized in that, comprising:

2. the movable board of chair according to claim 1, it is characterized in that: described elbow joint has the last pivot piece of being located at the table reverse side, one and the following pivot piece that screws togather of head, this time pivot piece is offered this curved arc guide rail, and each is interlaced and wear an axostylus axostyle and articulate each other with an end for pivot piece and this time pivot piece on this;

3. the movable board of chair according to claim 2, it is characterized in that: the described pivot piece of going up is established with reverse side and table group, be provided with a pedestal in the front, these pedestal central authorities have a groove, spiral shell is established a pushing block in this groove, and utilize the gap between pushing block and groove on pushing block, to be covered with a pushing block guard shield, and this pedestal is covered with a housing outward, and this corresponding pushing block guard shield of housing central authorities offers one for its elongated slot that passes;

4. the movable board of chair according to claim 1 is characterized in that: described location-plate generally is long slab figure sample and has head, tail two ends, the plate body between head, the tail end is formed a backstop section, and help the lining of pivot in this pivot sheathed;

When described table was positioned at the head end face, the backstop section of this location-plate was parallel with head; When this table placed the head right side, the backstop section of this location-plate was vertical with head, and blocked the pivot pendulum path of this elbow joint.

5. the movable board of chair according to claim 1 is characterized in that: described table is established a gripper shoe in reverse side elder generation spiral shell, and this gripper shoe offers one and holds mouth, establishes this elbow joint with this appearance mouthful group.