CN211567444U

CN211567444U - Propelling type chalk clamping device

Info

Publication number: CN211567444U
Application number: CN201921591452.6U
Authority: CN
Inventors: 吕金
Original assignee: Wuhan Polytechnic University
Current assignee: Wuhan Polytechnic University
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-09-25
Anticipated expiration: 2029-09-23

Abstract

The utility model provides a push-type chalk clamping device, the main structure of which comprises a front pen tube, a rear pen tube, a push rod, a screw and a chalk, the rear end of the chalk is placed in the front pen tube, the rear shell is connected with the upper end of the push rod, and the push rod can be driven to push the chalk by pressing the rear pen tube when in use; the screw is arranged at the lower end of the front pen tube and used for fixing the chalk. The utility model has the advantages that: the utility model provides a scheme not only can avoid hand direct contact chalk, can release the chalk in the past pen tube as required moreover, facilitates the use.

Description

Propelling type chalk clamping device

Technical Field

The utility model relates to a teaching aid especially relates to an impulse type chalk clamping device.

Background

The chalk is a common writing tool in teaching, and the existing chalk is usually used for writing by directly holding with hands. After long-time writing, hands can be stained with chalk dust, certain irritation can be caused to skin, and the complete chalk is easy to break off during writing, so that inconvenience is brought to teaching.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a simple structure, convenient to use's semi-automatic chalk.

The utility model provides a push-type chalk clamping device, which comprises a front pen tube, a rear pen tube, a push rod and a chalk, wherein the front pen tube is used for placing the chalk; the upper end of the propelling rod is connected with the rear pen tube; the outer surface of the front pen tube is provided with a track, the inner surface of the rear pen tube is provided with a slide block, and the track and the slide block are both in strip shapes and are identical in size; the rear pen tube is sleeved on the front pen tube, and the rear pen tube slides up and down on the front pen tube through the sliding block and the rail.

Furthermore, the lower end of the surface of the front pen tube is also provided with a screw and a screw hole; the screw is screwed into the front pen tube through the screw hole to fix the chalk.

Furthermore, the surface of the front pen tube is also provided with an anti-slip layer, and the anti-slip layer is arranged above the screw hole.

Furthermore, a baffle is arranged at the upper end inside the front pen tube.

The utility model provides a beneficial effect that technical scheme brought is: the utility model has simple structure and simple manufacture; the skin is prevented from directly contacting the chalk; according to the use requirement, a mode of pushing and propelling the chalk is adopted, and semi-automation is realized.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1-front pen tube; 2-rear pen tube; 3-a push rod; 4-a baffle plate; 5-a screw; 6-screw hole; 7-chalk; 8-an anti-slip layer; 9-track; 10-a slide block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.

Referring to fig. 1, an embodiment of the present invention provides a push-type chalk holding device, which includes a front pen tube 1, a rear pen tube 2, a push rod 3, a baffle 4, a chalk 7, a rail 9, and a slider 10, wherein the front pen tube 1 is used for placing the chalk 7; the outer side surface of the front pen tube 1 is provided with a track 9, the inner surface of the rear pen tube 2 is provided with a slide block 10, the rear pen tube 2 is sleeved on the front pen tube 1, and the rear pen tube 2 slides up and down on the front pen tube 1 through the slide block 10 and the track 9; the upper end of the propelling rod 3 is connected with the rear pen tube 2; the baffle 4 is arranged at the upper end inside the front pen tube 1; the screw hole 6 is arranged at the lower end of the surface of the front pen tube 1.

As an embodiment of the utility model, the length of back pen tube 2 is greater than the length of chalk 7, and baffle 4 sets up in the inside upper end of front pen tube 1, and the distance that baffle 4 allows is less than the diameter of the 3 lower extreme end departments of push rod, and back pen tube 2 drops when baffle 4's setting is in order to prevent that impulse type chalk clamping device from invering.

As an embodiment of the present invention, the surface of the front pen tube 1 is further provided with a screw 5 and a screw hole 6, and the screw 5 enters the front pen tube 1 through the screw hole 6 to hold the chalk 7, thereby fixing the chalk 7.

As an embodiment of the utility model, the surface of preceding pen tube 1 still is provided with skid resistant course 8, and screw 5's top is arranged in skid resistant course 8, and skid resistant course 8 can increase the frictional force between finger and the preceding pen tube 1.

When the chalk holder is used, a chalk 7 is inserted into the front pen tube 1, the screw 5 enters the front pen tube 1 through the screw hole 6 to prop against the chalk 7 in a rotating mode, and the chalk 7 is fixed; if the chalk 7 outside the front pen tube 1 is used up, the screw 5 is unscrewed and the rear pen tube 2 is pushed, the rear pen tube 2 slides downwards on the front pen tube 1 and drives the pushing rod 3, so that the pushing rod 3 pushes the chalk 7, and when the chalk 7 outside the front pen tube 1 reaches the required length, the screw 5 is screwed down to fix the chalk 7.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The push-type chalk clamping device is characterized by comprising a front pen tube, a rear pen tube, a push rod and chalk, wherein the front pen tube is used for placing the chalk; the upper end of the propelling rod is connected with the rear pen tube; the outer surface of the front pen tube is provided with a track, the inner surface of the rear pen tube is provided with a slide block, and the track and the slide block are both in strip shapes and are identical in size; the rear pen tube is sleeved on the front pen tube, and the rear pen tube slides up and down on the front pen tube through the sliding block and the rail.

2. The propelling chalk holding device as described in claim 1, wherein a screw and a screw hole are further provided on the lower end of the front pen tube surface; the screw is screwed into the front pen tube through the screw hole to fix the chalk.

3. The propelling chalk holding device as recited in claim 2, wherein an anti-slip layer is further disposed on the surface of the front tube, and the anti-slip layer is disposed above the screw hole.

4. The propelling chalk holding device as described in claim 1, wherein a baffle is further provided at an upper end of an inside of said front tube.