CN2351035Y

CN2351035Y - Blackboard

Info

Publication number: CN2351035Y
Application number: CN 98225509
Authority: CN
Inventors: 吴孙坚
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-10-28
Filing date: 1998-10-28
Publication date: 1999-12-01
Anticipated expiration: 2008-10-28

Abstract

The utility model provides a blackboard, comprising a blackboard body and a supporting frame. The blackboard body can be rotated on the supporting frame, and the both surfaces can be used. The utility model is characterized in that the both sides of the blackboard body (1) is fixedly provided with an installation shaft (4), and two installation holes (5) are arranged on the supporting frame (2). An installation shaft (4) of the blackboard body (1) is a stepped shaft, the external end is a thick shaft (4-A), and the inward part of the external end is a thin shaft (4-B). The size of the upper half part (5-A) of the installation hole (5) on the supporting frame (2) is larger, and the size of the lower half part (5-B) is smaller.

Description

Blackboard

The utility model relates to a kind of blackboard, relates in particular to a kind of support, plate body of having, the blackboard that can overturn and use in plate body two sides.

The blackboard that has support, plate body and the turning use of plate body at present, generally fixedly install mounting screw in plate body both sides, after being contained on the support, the plate body from the mounting screw outer end with nut screwing clamping the plate body is fixed on the support again, the entablature of support is provided with the bottom side that dog screw can withstand the plate body stops operating the plate body, this blackboard is installed to the plate body on the support cumbersome by mounting screw and nut, inconvenience is used.

The purpose of this utility model provides a kind of blackboard simple, easy to use of installing.

To achieve these goals, technical solution of the present utility model is such: blackboard comprises the plate body, support etc., the plate body can overturn on support and use on the two sides, wherein the both sides of plate body respectively fixedly install an installation shaft, two installing holes of relative set on the support, the installation shaft of plate body is a multidiameter, its outer end is thick axle, its outer end is divided into thin axle with inside, the first half size of the installing hole on the support is bigger, the latter half size is less, the size that the size of its first half is slightly larger than thick axle is that the thick axle of installation shaft can pass from the first half of installing hole, and the size of its latter half is slightly larger than the size of thin axle and is that the thin axle of installation shaft can be put the latter half of installing hole into and the thick axle of installation shaft cannot pass from the latter half of installing hole less than the size of thick axle.

Because in the above-mentioned technical solution, the thick axle of installation shaft can pass from the first half of installing hole, installation shaft can be packed in the installing hole, and the thick axle of installation shaft can not pass from the latter half of installing hole, in installation shaft is packed installing hole into since the effect installation shaft of plate body gravity be in the latter half of installing hole naturally and write normally that installation shaft can not skid off under the situation of use in installing hole, therefore the plate body of blackboard can install on the support easily, and is very easy to use.

Below in conjunction with drawings and Examples the utility model is described in further detail:

Fig. 1 is the structural representation of the utility model embodiment.

Fig. 2 is the local structure for amplifying schematic diagram of Fig. 1.

Fig. 3 is the enlarged diagram of installing hole on Fig. 1 medium-height trestle.

Fig. 4 is the A-A profile of Fig. 1.

Wherein: 1, plate body; 2, support; 3, entablature; 4, installation shaft; 5, installing hole; 6, installing hole stiffener; 7, positioning sleeve; 8, connecting axle; 9, back-moving spring.

As shown in the figure, blackboard is mainly by plate body 1, support 2 constitutes, support 2 is provided with entablature 3, the both sides of plate body 1 respectively fixedly install an installation shaft 4, two installing holes 5 of relative set on the support 2, the installation shaft 4 of plate body 1 is a multidiameter, its outer end is thick axle 4-A, its outer end is divided into thin axle 4-B with inside, the first half 5-A size of the installing hole 5 on the support 2 is bigger, the latter half 5-B size is less, the size that the size of its first half 5-A is slightly larger than thick axle 4-A is that the thick axle 4-A of installation shaft 4 can pass from the first half 5-A of installing hole 5, and the size of its latter half 5-B is slightly larger than the size of thin axle 4-B and is that the thin axle 4-B of installation shaft 4 can put the latter half 5-B of installing hole 5 into and the thick axle 4-A of installation shaft 4 cannot pass from the latter half 5-B of installing hole 5 less than the size of thick axle 4-A.In order to improve the intensity of installing hole 5, installing hole 5 end faces on support 2 are provided with installing hole stiffener 6 in addition, have on the installing hole stiffener 6 and the identical through hole of installing hole 5 shapes.

Convenient for the upset location that makes plate body 1, present embodiment is provided with a location device on the entablature 3 of support 2, and positioner mainly is made of positioning sleeve 7, connecting axle 8, back-moving spring 9, and wherein the groove of positioning sleeve 7 can hold the thickness of plate body 1 just.

Claims

1, a kind of blackboard, comprise the plate body, support etc., the plate body can overturn on support and use on the two sides, it is characterized in that: the both sides of plate body (1) respectively fixedly install an installation shaft (4), support (2) is gone up two installing holes of relative set (5), the installation shaft (4) of plate body (1) is a multidiameter, its outer end is a thick axle (4-A), its outer end is divided into thin axle (4-B) with inside, the first half (5-A) size of the installing hole (5) on the support (2) is bigger, the latter half (5-B) size is less, the size that the size of its first half (5-A) is slightly larger than thick axle (4-A) is that the thick axle (4-A) of installation shaft (4) can pass from the first half (5-A) of installing hole (5), and the size of its latter half (5-B) is slightly larger than the size of thin axle (4-B) and is that the thin axle (4-B) of installation shaft (4) can be put the latter half (5-B) of installing hole (5) into and the thick axle (4-A) of installation shaft (4) cannot pass from the latter half (5-B) of installing hole (5) less than the size of thick axle (4-A).

2, blackboard according to claim 1 is characterized in that: installing hole (5) end face on the support (2) is provided with installing hole stiffener (6), has on the installing hole stiffener (6) and the identical through hole of installing hole (5) shape.

3, blackboard according to claim 1 and 2, it is characterized in that: the entablature (3) of support (2) is provided with a location device, it comprises positioning sleeve (7), connecting axle (8), back-moving spring (9) etc., and wherein the groove of positioning sleeve (7) can hold the thickness of plate body (1).