CN201006659Y

CN201006659Y - Automatic chalk

Info

Publication number: CN201006659Y
Application number: CNU2007200781459U
Authority: CN
Inventors: 赵爽宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-01-10
Filing date: 2007-01-10
Publication date: 2008-01-16
Anticipated expiration: 2017-01-10

Abstract

The utility model discloses an automatic chalk, which can be lifted out section by section when in use and avoid directly being contacted by user. The utility model comprises a frame which upper end is provided with a port via which the front end of the chalk can be extruded outside, a clamp device for handling the back end of the chalk, and a pushing device for moving the clamp device axially on the frame repeatedly. The utility model has the advantages that user hand can avoid directly contact chalk, to keep clean and health, and the pushing device can lift out the upper end of the chalk section by section via press, to improve the utilization of chalk.

Description

Automatic chalk

Technical field

The utility model relates to a kind of automatic chalk that can stretch out automatically.

Background technology

Chalk is the apparatus of writing on blackboard.Need when existing chalk is write directly to grip with hand, the user can be stained with chalk dust on hand, contacts chalk dust for a long time and can make the hand skin drying.In addition, owing to need leave the position for the hand gripping of sufficient length, therefore writing of every chalk can only use about 2/3rds of its length, chalk can not be used up, and has the not high deficiency of effective rate of utilization.

The utility model content

Technical problem to be solved in the utility model provides a kind of automatic chalk, and chalk can eject piecemeal during use, and the user does not directly contact with the chalk body.

The technical scheme that its technical problem that solves the utility model adopts is: automatic chalk of the present utility model is characterized in that it comprises: housing, and its upper end has the port that stretches out for the chalk leading section; Clamping device is used to grip the chalk rearward end; Delivery device acts on and makes it along the straight reciprocating motion of housing axis on the clamping device.

The beneficial effects of the utility model are, user's hand does not directly contact with the chalk body, therefore can not be stained with chalk dust, help and keep clean and healthy; By push action, by delivery device the chalk upper end is ejected piecemeal, help improving the utilization rate of chalk.

Description of drawings

This specification comprises following three width of cloth accompanying drawings:

Fig. 1 is the structural representation of the automatic chalk embodiment 1 of the utility model;

Fig. 2 is the structural representation of the automatic chalk embodiment 2 of the utility model;

Fig. 3 is the cutaway view along A-A among Fig. 1.

Parts, toponym and pairing mark among the figure: loam cake 10, drain pan 11, push rod 20, interior cover 21, flap valve 21a, tapered sleeve 22, spring 23, button 24, wedge shape platform 25, wedge-shaped slot 26.

The specific embodiment

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

See figures.1.and.2, automatic chalk of the present utility model comprises: housing, and its upper end has the port that stretches out for the chalk leading section; Clamping device is used to grip the chalk rearward end; Delivery device acts on and makes it along the straight reciprocating motion of housing axis on the clamping device.Grip housing during use, hand no longer directly contacts with the chalk body, therefore can not be stained with chalk dust, helps cleaning and healthy.By push action, by delivery device the chalk upper end is ejected piecemeal, help improving the utilization rate of chalk.

See figures.1.and.2, cover 21 and tapered sleeve 22 in described clamping device comprises, tapered sleeve 22 is fixed on the housing.With reference to Fig. 3, the top of interior cover 21 has the flap valve 21a that contacts and cooperate with this tapered sleeve 22 inwalls.In chalk is deposited in the cover 21, and by the flap valve 21a clamping on interior cover 21 tops, interior cover 21 is when moving or moving down on tapered sleeve 22 axis, and the opening and closing action takes place flap valve 21a, the chalks in the interior cover 21 is ejected piecemeal, and keep stable position.

See figures.1.and.2, described delivery device comprises push rod 20 and spring 23, and the front end of this push rod 20 is connected with the lower end of interior cover 21, and the two end axles of spring 23 is to acting on housing and the push rod 20.The effect of spring 23 is to make axially movable push rod 20 from horizontal reset.In by the embodiment shown in Fig. 11, the rearward end of described push rod 20 is extended outside the housing, cover 21 in promptly pushing by the rear end of pushing push rod 20.In by the embodiment shown in Fig. 22, described delivery device also comprises button 24, this button 24 has the wedge shape platform 25 that radially stretches in the housing, on push rod 20, then be provided with corresponding with it wedge-shaped slot 26, it is lateral press button 24, by corresponding and cooperate wedge shape platform 25, wedge-shaped slot 26, radial load is converted into axial force, cover 21 in push rod 20 being moved on axially push.See figures.1.and.2, described housing is made of loam cake 10, the drain pan 11 of detachable shaft to butt joint, and described tapered sleeve 22 is compressed by the port of loam cake 10, drain pan 11 butt joints.

Some principles of the above automatic chalk of the utility model that just explains through diagrams, be not be the automatic chalk of the utility model to be confined to shown in and in described concrete structure and the scope of application, so every the corresponding modify and equivalent that might be utilized all belongs to the claim that the utility model is applied for.

Claims

1. automatic chalk is characterized in that it comprises: housing, and its upper end has the port that stretches out for the chalk leading section; Clamping device is used to grip the chalk rearward end; Delivery device acts on and makes it along the straight reciprocating motion of housing axis on the clamping device.

2. automatic chalk as claimed in claim 1 is characterized in that: described clamping device comprises interior cover (21) and tapered sleeve (22), and tapered sleeve (22) is fixed on the housing, and the top of interior cover (21) has the flap valve (21a) that contacts and cooperate with this tapered sleeve (22) inwall.

3. automatic chalk as claimed in claim 2 is characterized in that: described delivery device comprises push rod (20) and spring (23), and the front end of this push rod (20) is connected with the lower end of interior cover (21), and the two end axles of spring (23) is to acting on housing and the push rod (20).

4. automatic chalk as claimed in claim 3 is characterized in that: the rearward end of described push rod (20) is extended outside the housing.

5. automatic chalk as claimed in claim 3 is characterized in that: described delivery device also comprises button (24), and this button (24) has the wedge shape platform (25) that radially stretches in the housing, then is provided with corresponding with it wedge-shaped slot (26) on push rod (20).

6. as any described automatic chalk of claim 2 to 5, it is characterized in that: described housing is made of loam cake (10), the drain pan (11) of detachable shaft to butt joint, and described tapered sleeve (22) is compressed by the port of loam cake (10), drain pan (11) butt joint.