CN201867992U

CN201867992U - Telescopic pointer

Info

Publication number: CN201867992U
Application number: CN2010206313238U
Authority: CN
Inventors: 龙光国
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-11-30
Filing date: 2010-11-30
Publication date: 2011-06-15
Anticipated expiration: 2020-11-30

Abstract

The utility model discloses a telescopic pointer, which comprises three hard sleeves. The three hard sleeves with thicknesses sequentially reduced are sleeved with each other, a section of groove I is axially arranged on the inner circumferential surface of the first sleeve, two sections of circumferential grooves II are connected to two ends of the axial groove I, the outer circumferential surface of the second sleeve is provided with teeth in axial direction, the teeth respectively match with the groove I and the grooves II, a positioning clamp is arranged at an inlet at the bottom end of the first sleeve, a sleeving structure between the second sleeve and the third sleeve is identical to that between the first sleeve and the second sleeve, and a ball is disposed on the top of the third sleeve. After the structure is adopted, when needing to stretch the pointer, a user first rotates the ball on the top of the third sleeve for a certain angle to withdraw the teeth from the groove II at the bottom, then pulls up to stretch the pointer, and then rotates the ball for a certain angle again so that the teeth enter the groove II at the top end and the pointer is fixed. The telescopic pointer is simple in structure and is stable and reliable.

Description

A kind of telescopic teacher's pointer

Technical field

The utility model relates to teaching aid, relates in particular to a kind of teacher's pointer that can stretch.

Background technology

Last class hour of teacher,, often used teacher's pointer in order to attract student's notice.At present, employed teacher's pointer generally is a regular length, exists during use, refers to less than some position as if having lacked because of teacher's pointer; If teacher's pointer grow, use is smoothly problem not.

As from the foregoing, above-mentioned existing teacher's pointer on reality is used, obviously has inconvenience and exists with defective, and remain to be improved.

Thus, the improving of the above-mentioned defective of the utility model thoughts is that the spy concentrates on studies and cooperates the utilization of scientific principle, proposes a kind of reasonable in design and effectively improve the utility model of above-mentioned defective finally.

Summary of the invention

At the weak point that prior art exists, the utility model aims to provide a kind of teacher's pointer simple in structure, capable of expansion and contraction, easy to use.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model: a kind of telescopic teacher's pointer, form by the mutual socket of hard tube that three joints attenuate one by one, the inner peripheral surface of first segment sleeve pipe axially have one section groove I, two ends at described axial notch I connect one section circumferential groove II, the outer circumference surface of the second joint sleeve pipe axially on have tooth, described tooth is complementary with groove I and groove II respectively, inlet is provided with locator card in the bottom of first segment sleeve pipe; The socket join structure that the second joint sleeve pipe and the 3rd saves between the sleeve pipe is identical with second socket join structure that saves between the sleeve pipe with the first segment sleeve pipe.

Top at the 3rd joint sleeve pipe is provided with a spheroid.

After adopting said structure, if need to elongate teacher's pointer, the 3rd joint sleeve pipe top spheroid is at first turned an angle, make tooth withdraw from the groove II of bottom, draw high then, teacher's pointer just extends, and turns an angle again, and tooth is by the groove II that enters the top, and teacher's pointer length is fixed.

The utility model is simple in structure, and is reliable and stable.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the A-A section amplification figure of Fig. 1;

In the accompanying drawing: the 1-first sleeve pipe 2-second sleeve pipe 3-the 3rd sleeve pipe 4-groove I 5-groove II 6-tooth 7-locator card 8-spheroid.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 1 and Figure 2, a kind of telescopic teacher's pointer, form by the mutual socket of hard tube that three joints attenuate one by one, can certainly be processed into the mutual socket of hard tube that is attenuated one by one by 4 or 5 joints forms, the inner peripheral surface of first segment sleeve pipe 1 axially have one section axial notch I4, two ends at described axial notch I4 connect one section circumferential groove II5, since the outer circumference surface of the second joint sleeve pipe 2 axially on have two teeth 6, so at the two ends of groove 4, the quantity of the circumferential groove II5 that is complementary with two teeth 6 is 2 respectively; Certainly the quantity of tooth 6 can be designed as three, and the quantity of the groove II5 that matches like this just is three; Inlet is provided with locator card 7 on the top of first segment sleeve pipe; The socket join structure that the second joint sleeve pipe 2 and the 3rd saves between the sleeve pipe 3 is identical with second socket join structure that saves between the sleeve pipe 2 with first segment sleeve pipe 1, no longer repeats.

Length after this teacher's pointer shrinks is near a chi, when the students of the junior years' head when books are too near, teacher this can have been shunk teacher's pointer between student's head and books than once, remind the student to note sitting posture, the normalized distance that keeps reading from; Also spheroid 8 can be arranged to redness, first segment sleeve pipe 1 is arranged to white, the second joint sleeve pipe 2 and the 3rd joint sleeve pipe 3 are arranged to green, with this concentrated student's notice.

The above; it only is the embodiment of the utility model embodiment; but protection domain of the present utility model is not limited thereto; any those of ordinary skill in the art are in the technical scope that the utility model discloses; conspicuous variation or replacement all should be encompassed within the protection domain of the present utility model.

Claims

1. telescopic teacher's pointer, form by the mutual socket of hard tube that three joints attenuate one by one, it is characterized in that: the inner peripheral surface of first segment sleeve pipe (1) axially have one section groove (I4), two ends at described axial notch I (4) connect one section circumferential groove II (5), the outer circumference surface of the second joint sleeve pipe (2) axially on have tooth (6), described tooth (6) is complementary with groove I (4) and groove II (5) respectively, and inlet is provided with locator card (7) in the bottom of first segment sleeve pipe (1); The socket join structure that the second joint sleeve pipe (2) and the 3rd saves between the sleeve pipe (3) is identical with second socket join structure that saves between the sleeve pipe (2) with first segment sleeve pipe (1).

2. telescopic teacher's pointer according to claim 1 is characterized in that: the top at the 3rd joint sleeve pipe (3) is provided with a spheroid (8).