CN203535862U

CN203535862U - Triangular interior angle and demonstrator

Info

Publication number: CN203535862U
Application number: CN201320749790.4U
Authority: CN
Inventors: 郑卫生
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-11-16
Filing date: 2013-11-16
Publication date: 2014-04-09
Anticipated expiration: 2023-11-16

Abstract

The utility model provides a triangular interior angle and a demonstrator. The demonstrator comprises a side A1, a side A2, a side B1, a side B2, a side C1 and a side C2, wherein the side A1 is hinged with the side C2 through a connecting piece; the side A2 is hinged with the side B1 through a connecting piece; the side B2 is hinged with the side C1 through a connecting piece. The demonstrator is characterized in that the side A1 is rotationally connected with the side A2; the side B1 is rotationally connected with the side B2; the side C1 and the side C2 are connected in an insertion manner; the lengths of the side A1 and the side A2 are identical; the side B2 is a telescopic rod; one end, close to the side C2, of the side C1 is a telescopic rod; an inserting groove matched with the telescopic rod is formed in the side C2. The demonstrator is convenient to use, easy and popular to understand in demonstration, convenient to carry and place, and applicable to various situations.

Description

A kind of angle sum of a triangle demonstration device

Technical field

The utility model relates to teaching aid field, specifically, relates to a kind of angle sum of a triangle demonstration device.

Background technology

In teaching, use teaching aid to carry out teaching demonstration, can be convenient to the understanding of student to some knowledge, Students ' Learning is got up more light, but our teaching aid is less at present, only teaching aids are mostly also function singlenesses.Such as diabolo in mathematical education is said time service, the relation between leg-of-mutton angle and angle, limit and limit, interior angle and exterior angle and the variation relation between them, have no idea to demonstrate by a common set square teaching aid.

Existing angle sum of a triangle demonstration device is mostly a set square and cuts into three parts, or triangle frame coordinates with other objects, out-of-shape, collection area occupied is large, easily damage, be not easy preservation and only can demonstrate a kind of triangle, can not meet multiple situation.

Utility model content

The purpose of this utility model is to overcome the weak point of above-mentioned conventional art, and a kind of preservation that is suitable for is provided, and can demonstrate various triangular, angle sum of a triangle demonstration device easy to carry.

The technical solution of the utility model is:

A kind of angle sum of a triangle demonstration device, comprise A1 limit, A2 limit, B1 limit, B2 limit, C1 limit and C2 limit, described A1 limit and C2 limit are hinged by web member, described A2 limit and B1 limit are hinged by web member, described B2 limit and C1 limit are hinged by web member, it is characterized in that: described A1 limit and A2 limit are rotationally connected, described B1 limit and B2 limit are rotationally connected, peg graft in described C1 limit and C2 limit, described A1 limit and A2 limit equal in length, described B2 limit is expansion link, described C1 limit is expansion link near the one end on C2 limit, described C2 limit is provided with the slot matching with expansion link, described A1 limit is above C2 limit, described A2 limit is above A1 limit, described B1 limit is above A2 limit, described B2 limit is above B1 limit, described C1 limit is above B2 limit.

Described C2 stretches out outlying one end from C1 limit and is provided with link.

Described web member comprises nut, threaded area, screw rod district and catch, described screw rod district is positioned at the thickness that threaded area below and length surpass A1 limit, A2 limit, B1 limit, B2 limit, C1 limit or each limit, C2 limit, and the length of described threaded area is greater than the thickness on A1 limit, A2 limit, B1 limit, B2 limit, C1 limit or each limit, C2 limit.

Described catch is magnetisable material.

Described slot and C1 limit removably connect.

Described slot bottom is provided with bolt, and C1 limit is provided with the threaded hole matching with bolt.

When being used, the utility model angle sum of a triangle demonstration device can select as required the triangle needing, during class-teaching of teacher, C2 limit is extracted out in slot, rotate each limit, web member is coincided with the upper and lower and can verify that angle sum of a triangle is 180 degree, and the relation between leg-of-mutton angle and angle, limit and limit, interior angle and exterior angle and the variation relation between them, while not using, also each limit can be rotated to a place puts together and packs up, by link, carry or hang up, easy to use, demonstrate easy-to-understandly, be easy to carry and lay, can adapt to multiple situation.

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of angle sum of a triangle demonstration device of the utility model;

Fig. 2 is the left view of Fig. 1;

Constitutional diagram when Fig. 3 is a kind of angle sum of a triangle demonstration device demonstration of the utility model;

Fig. 4 is a kind of constitutional diagram of a kind of angle sum of a triangle demonstration device of the utility model when packing up;

Fig. 5 is the structural representation of described web member.

In figure: 1-link; 2-C2 limit; 3-web member; 4-A1 limit; 5-A2 limit; 6-B1 limit; 7-B2 limit; 8-C1 limit; 9-slot; 51-nut; 52-threaded area; 53-screw rod district; 54-catch.

Embodiment

Embodiment 1: as depicted in figs. 1 and 2, a kind of angle sum of a triangle demonstration device, comprise A1 limit 4, A2 limit 5, B1 limit 6, B2 limit 7, C1 limit 8 and C2 limit 2, described A1 limit 4 is hinged by web member 3 with C2 limit 2, described A2 limit 5 is hinged by web member 3 with B1 limit 6, described B2 limit 7 is hinged by web member 3 with C1 limit 8, described A1 limit 4 and A2 limit 5 are rotationally connected, described B1 limit 6 and B2 limit 7 are rotationally connected, peg graft in described C1 limit 8 and C2 limit 2, described A1 limit 4 and A2 limit 5 equal in length, described B2 limit 7 is expansion link, 8 one end near C2 limit 2, described C1 limit are expansion link, described C2 limit 2 is provided with the slot 9 matching with expansion link, described A1 limit 4 is above C2 limit 2, described A2 limit 5 is above A1 limit 4, described B1 limit 6 is above A2 limit 5, described B2 limit 7 is above B1 limit 6, described C1 limit 8 is above B2 limit 7.

Described C2 limit 2 is stretched out away from the one end on C1 limit 8 and is provided with link 1.

As shown in Figure 5, described web member 3 comprises nut 51, threaded area 52, screw rod district 53 and catch 54, described screw rod district 53 is positioned at the thickness that 52 belows, threaded area and length surpass A1 limit 4, A2 limit 5, B1 limit 6, B2 limit 7,

C1 limit

8 or 2 each limits, C2 limit, and the length of described threaded area 52 is greater than the thickness on A1 limit 4, A2 limit 5, B1 limit 6, B2 limit 7,

C1 limit

8 or 2 each limits, C2 limit.

Described catch is magnetisable material.

Described slot 9 removably connects with C1 limit 8.

Described slot 9 bottoms are provided with bolt, and C1 limit 8 is provided with the threaded hole matching with bolt.

During use, nut 51 is upwards twisted, while making screw rod district 53 be positioned at lower floor limit completely, now, two hinged limits can relatively rotate, web member 3 bottoms arrange the limit that was positioned at bottom when catch 54 both can prevent from rotating and drop, teacher is the triangle of the length of adjustable telescopic rod and the required demonstration of angle Selection on two limits as required, right-angle triangle for example, isosceles triangle, sealene triangle etc., after choosing, nut 51 is tightened, now, some is positioned at threaded area 52 below, bottom and upper segment is fixed simultaneously, prevent from relatively rotating, during class-teaching of teacher demonstration, the expansion link on C1 limit 8 is shortened, from slot 9, extract out, the length variations of C1 limit 8 expansion links can not affect the angle between C1 limit 8 and B2 limit 7, rotate each limit, web member 3 is overlapping, catch 54 is magnetisable material, now can adsorb the nut 51 of overlapping rear lower, prevent from relatively rotating.

Described expansion link comprises body, is provided with chute in body, is provided with saddle with matching in chute, body and saddle are bolted, during use, unclamp bolt, saddle can be extracted out in chute, extend the length of expansion link, or saddle is slided in chute, shorten the length of expansion link, while not using, tight a bolt, stop saddle and chute relative motion.

As shown in Figure 3, after teacher rotates well by each limit, can clearly demonstrate an Atria interior angle and be 180 degree, C2 limit 2 is stretched out in alignment away from the one end on C1 limit 8, be convenient to demonstrate three interior angles and be that 180 degree simultaneously also can be demonstrated the angular relationship of straight line and angle sum of a triangle, clear blunt, be convenient to student memory.

As shown in Figure 4, while not using this kind of angle sum of a triangle demonstration device, each limit can be rotated to a place and put together, slot 9 can be stayed on C2 limit 2, also can unload with demonstration device and be contained in a place, can also demonstration device be suspended on to a place by link 1, be convenient to folding and unfolding and carry.

Claims

1. an angle sum of a triangle demonstration device, comprise A1 limit (4), A2 limit (5), B1 limit (6), B2 limit (7), C1 limit (8) and C2 limit (2), described A1 limit (4) is hinged by web member (3) with C2 limit (2), described A2 limit (5) is hinged by web member (3) with B1 limit (6), described B2 limit (7) is hinged by web member (3) with C1 limit (8), it is characterized in that: described A1 limit (4) and A2 limit (5) are rotationally connected, described B1 limit (6) and B2 limit (7) are rotationally connected, peg graft in described C1 limit (8) and C2 limit (2), described A1 limit (4) and A2 limit (5) equal in length, described B2 limit (7) is expansion link, described C1 limit (8) is expansion link near the one end on C2 limit (2), described C2 limit (2) is provided with the slot (9) matching with expansion link, described A1 limit (4) is in the top of C2 limit (2), described A2 limit (5) is in the top of A1 limit (4), described B1 limit (6) is in the top of A2 limit (5), described B2 limit (7) is in the top of B1 limit (6), described C1 limit (8) is in the top of B2 limit (7).

2. angle sum of a triangle demonstration device according to claim 1, is characterized in that: described C2 limit (2) is stretched out away from the one end of C1 limit (8) and is provided with link (1).

3. angle sum of a triangle demonstration device according to claim 1 and 2, it is characterized in that: described web member (3) comprises nut (51), threaded area (52), screw rod district (53) and catch (54), described screw rod district (53) is positioned at below, threaded area (52) and length surpasses A1 limit (4), A2 limit (5), B1 limit (6), B2 limit (7), the thickness on C1 limit (8) or each limit, C2 limit (2), the length of described threaded area (52) is greater than A1 limit (4), A2 limit (5), B1 limit (6), B2 limit (7), the thickness on C1 limit (8) or each limit, C2 limit (2).

4. angle sum of a triangle demonstration device according to claim 3, is characterized in that: described catch (54) is magnetisable material.

5. angle sum of a triangle demonstration device according to claim 1 and 2, is characterized in that: described slot (9) removably connects with C1 limit (8).

6. angle sum of a triangle demonstration device according to claim 5, is characterized in that: described slot (9) bottom is provided with bolt, and C1 limit (8) are provided with the threaded hole matching with bolt.