CN203511045U

CN203511045U - Chalk sleeve

Info

Publication number: CN203511045U
Application number: CN201320696261.2U
Authority: CN
Inventors: 赵振蕾
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-10-30
Filing date: 2013-10-30
Publication date: 2014-04-02
Anticipated expiration: 2023-10-30

Abstract

The utility model discloses a chalk sleeve. The chalk sleeve comprises a housing, wherein a clamping device for clamping a chalk is arranged at one end of the housing; the clamping device comprises two arc-shaped boards; two guide shafts are fixedly connected to each arc-shaped board; the ends, far away from the arc-shaped boards, of the guide shafts penetrate through the housing and can slide relative to the housing; the parts, of the guide shafts, between the arc-shaped boards and the inner wall of the housing are sleeved with second springs; an accommodating chamber for accommodating the chalk is arranged between the two arc-shaped boards; a partition board is connected with the parts, close to the arc-shaped boards, of the housing in a sliding manner; a first spring is fixedly connected with the side, far away from the arc-shaped boards, of the partition board; a sliding block is connected with the first spring; a motor is fixedly connected with the part, close to the sliding block, in the housing; a threaded shaft is fixedly connected with the output shaft of the motor and is in threaded connection with the sliding block. The chalk sleeve can prevent breakage of the chalk effectively during writing; meanwhile, the length of the exposed part of the chalk can be adjusted through the motor, and thus automatic adjustment on the chalk is realized. The chalk sleeve is convenient to use.

Description

A kind of chalk sleeve

Technical field

The utility model relates to a kind of chalk sleeve, belongs to teaching aid technical field.

Background technology

In school instruction process, teacher be unable to do without on blackboard and writes, write nature and be unable to do without lime chalk, although along with scientific and technical development, many contents of courses adopt electronic curtain teaching, but the teaching of traditional chalk has its irreplaceable effect, it writes convenience, flexible, is not subject to time, spatial limitation.But adopt chalk to write on blackboard and can stick to teacher on hand by a lot of lime powder of generation, to skin, damage.

The patent No. is that 201110193321.4 utility model patent discloses a kind of adjustable chalk holder, efficiently solve the problem that teacher damages to hand skin when writing, but the inner sleeve of the chalk sleeve of this structure and chalk are to be rigidly connected, the chalk that easily fractures when writing, can not adjust chalk and expose outside length automatically.

Utility model content

The technical problems to be solved in the utility model is for the deficiencies in the prior art, provides a kind of and can effectively prevent that chalk from fractureing, and can automatically adjust the chalk sleeve that chalk is exposed on the external length.

For addressing the above problem, the utility model by the following technical solutions:

A kind of chalk sleeve, comprise shell, described shell is wherein provided with for clamping the clamping device of chalk in one end, described clamping device comprises two arcs, on each arc, be fixedly connected with two guide shafts, described guide shaft away from one end of arc through shell and with can opposite shell slide, the position on described guide shaft between arc and the inwall of shell is set with the second spring, between described two arcs, is provided with the container cavity that can hold chalk;

Position near arc in described shell slidably connects dividing plate, and the side away from arc on described dividing plate is fixedly connected with the first spring, on described the first spring, is connected with sliding shoe;

Position near sliding shoe in described shell is fixedly connected with motor, on the output shaft of described motor, is fixedly connected with thread spindle, and described thread spindle is threaded with sliding shoe;

Threaded one end away from arc on described shell is connected with tail-hood, and the position in described shell between tail-hood and motor is provided with the battery compartment that can hold battery.

Below further improvement of the utility model:

Motor control switch is established in the outside of described shell.

The utility model adopts technique scheme, while writing because the effect of the first spring and the second spring has been avoided chalk and has been rigidly connected in the enclosure, in the time of can effectively preventing chalk-writing, rupture, the length being simultaneously exposed on the external by motor capable of regulating chalk, realized the automatic adjusting of chalk, easy to use.

Below in conjunction with accompanying drawing the technical solution of the utility model, be described further.

Accompanying drawing explanation

Accompanying drawing 1 is the structural representation of the utility model embodiment.

In figure: 1-shell; 2-sliding shoe; 3-motor; 4-thread spindle; 5-battery compartment; 6-tail-hood; 7-motor control switch; 8-clamping device; 9-arc; 10-guide shaft; 11-the first spring; 12-dividing plate; 13-the second spring; 14-container cavity; M-chalk.

The specific embodiment

Embodiment, as shown in Figure 1, a kind of chalk sleeve, comprise shell 1, described shell 1 is wherein provided with for clamping the clamping device 8 of chalk in one end, described clamping device 8 comprises two arcs 9, on each arc 9, be fixedly connected with two guide shafts 10, described guide shaft 10 away from one end of arc 9 through shell 1 and with can opposite shell 1 slide, position on described guide shaft 10 between arc 9 and the inwall of shell 1 is set with the second spring 13, two arcs 9 can fasten under the effect of the second spring 13, after fastening, described two arcs 9 can form a container cavity 14 that holds chalk.

The interior position near arc 9 of described shell 1 slidably connects dividing plate 12, and the side away from arc 9 on described dividing plate 12 is fixedly connected with the first spring 11, on described the first spring 11, is connected with sliding shoe 2; The interior position near sliding shoe 2 of described shell 1 is fixedly connected with motor 3, on the output shaft of described motor 3, be fixedly connected with thread spindle 14, described thread spindle 14 is threaded with sliding shoe 2, and motor 3 motions can drive thread spindle 14 rotate and then can drive sliding shoe 2 to move up and down along thread spindle 14.

Threaded one end away from arc 9 on described shell 1 is connected with tail-hood 6, and the position in described shell 1 between tail-hood 6 and motor 3 is provided with the battery compartment 5 that can hold battery.

The outside of described shell 1 is provided with the motor control switch 7 that can control motor 3 rotatings.

During use, starter motor 3 makes motor forward drive sliding shoe 2 to move upward to maximum travel position, chalk M is clamped between two arcs 9, upwards promoting chalk M makes it withstand dividing plate 12, by motor control switch 7, make motor reversal drive sliding shoe 2 to move downward, and then promote chalk M and move downward its end is exposed.While writing, due to the effect of the first spring 11 and the second spring 13, avoided chalk M and be rigidly attached in shell 1, fracture in the time of can effectively preventing that chalk M from writing, the length being simultaneously exposed on the external by motor 3 capable of regulating chalk M, has realized the automatic adjusting of chalk M.

Claims

1. a chalk sleeve, comprise shell (1), it is characterized in that: described shell (1) is wherein provided with the clamping device (8) for clamping chalk in one end, described clamping device (8) comprises two arcs (9), on each arc (9), be fixedly connected with two guide shafts (10), described guide shaft (10) away from one end of arc (9) through shell (1) and with can opposite shell (1) slide, the position being positioned on described guide shaft (10) between arc (9) and the inwall of shell (1) is set with the second spring (13), between described two arcs (9), be provided with the container cavity (14) that can hold chalk,

Position near arc (9) in described shell (1) slidably connects dividing plate (12), the upper side away from arc (9) of described dividing plate (12) is fixedly connected with the first spring (11), is connected with sliding shoe (2) on described the first spring (11); Position near sliding shoe (2) in described shell (1) is fixedly connected with motor (3), on the output shaft of described motor (3), be fixedly connected with thread spindle (14), described thread spindle (14) is threaded with sliding shoe (2);

The upper threaded one end away from arc (9) of described shell (1) is connected with tail-hood (6), and the position being positioned in described shell (1) between tail-hood (6) and motor (3) is provided with the battery compartment (5) that can hold battery.

2. a kind of chalk sleeve according to claim 1, is characterized in that: motor control switch (7) is established in the outside of described shell (1).