CN216507636U

CN216507636U - Safe compasses needle device

Info

Publication number: CN216507636U
Application number: CN202120993385.1U
Authority: CN
Inventors: 徐玮谦; 李仁�; 陆云峰
Original assignee: Shanghai M&G Stationery Inc
Current assignee: Shanghai M&G Stationery Inc
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-05-13
Anticipated expiration: 2031-05-10

Abstract

The utility model discloses a safe compass needle device which comprises a needle rod shell (1), a compass needle (4) which is arranged in the needle rod shell (1) and can move longitudinally relative to the needle rod shell, and a guide mechanism which is rotatably assembled in the needle rod shell (1), wherein the compass needle (5) is matched with the guide mechanism so that the compass needle (5) can move longitudinally relative to the needle rod shell (1) by rotating the guide mechanism, and thus, a compass needle point (4) at the top of the compass needle (5) extends out of or retracts into the needle rod shell (1).

Description

Safe compasses needle device

Technical Field

The utility model relates to the field of stationery, in particular to a compasses needle device.

Background

The compasses are indispensable tools in drawing, are the necessary instrument of official working, study. The existing compasses are generally characterized in that one support is connected with a writing tool, and the other support is connected with a positioning needle. In the actual use process, because the pilot pin leaks for a long time, the use is easy to hurt people, and the phenomenon that the needle point is passivated and slides on the paper surface is easy to occur due to the fact that the pilot pin falls carelessly, so that the use experience of an operator and the circle drawing precision are influenced. At present, compasses with a protective sleeve have the function of protecting a positioning needle, but the protective sleeve is easy to lose and causes inconvenience for use.

Therefore, in order to improve the safety and operability of the compass, it is necessary to develop a new compass needle.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel compass needle for improving the safety and operability of compasses.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a safe compass needle device comprises a needle rod shell, a compass needle which is arranged in the needle rod shell and can move longitudinally relative to the needle rod shell, and a guide mechanism which is rotatably assembled in the needle rod shell, wherein the compass needle is matched with the guide mechanism so that the compass needle can move longitudinally relative to the needle rod shell by rotating the guide mechanism, and therefore, a compass needle point at the top of the compass needle extends out of or retracts into the needle rod shell.

Furthermore, the side wall of the compass needle is provided with a limit salient point, the inner wall of the needle rod shell is longitudinally provided with a limit sliding groove, the limit salient point extends into the limit sliding groove and can slide in the limit sliding groove, so that the compass needle is guided to longitudinally slide along the needle rod shell and is prevented from rotating relative to the needle rod shell, and the limit salient point is matched with the guide mechanism.

Furthermore, the guide mechanism is a hollow cylinder, the outer diameter of the guide mechanism is smaller than the inner diameter of the needle bar shell, the inner diameter of the guide mechanism is larger than the diameter of the compass needle, and the compass needle is contained in the guide mechanism.

Furthermore, a guide groove is formed in the guide mechanism, the width of the guide groove is larger than that of the limiting convex point, the limiting convex point protrudes into the limiting sliding groove through the guide groove, the guide groove comprises a spiral section surrounding the guide mechanism, and the limiting convex point slides along the limiting sliding groove and the guide groove of the spiral section simultaneously due to rotation of the guide mechanism, so that the compass needle longitudinally moves relative to the needle rod shell.

Furthermore, the upper half section of the guide groove is the spiral section which surrounds the guide mechanism for a circle, and the lower half section of the guide groove is a straight section.

Further, a knob is arranged at the top end of the guide mechanism, the outer diameter of the knob is larger than that of the guide mechanism, and the knob is used for being held by a user to rotate the guide mechanism.

Further, the knob periphery is equipped with a plurality of longitudinal grooves for increase the frictional force of gripping.

Further, the guide mechanism is assembled on the needle bar shell through a knob buckle, and the knob buckle is a circumferential buckle arranged at the bottom of the guide mechanism, so that the guide mechanism can be rotationally fixed relative to the needle bar shell.

A safe compass comprises two compass supporting legs and further comprises the safe compass needle device, wherein the needle rod shell of the safe compass needle device is fixed at the tail end of one of the compass supporting legs.

The utility model has the technical effects that:

1. the safe compass needle device is a telescopic device. By rotating the guide mechanism, the compass needle tip can extend out of one end of the needle rod shell of the safe compass needle device, otherwise, when the guide mechanism rotates reversely, the needle tip can be retracted into the needle rod shell to play a role in protecting the needle tip. When the user does not use the safe compass needle device, the sharp needle can be retracted, thereby avoiding puncture.

2. The rotary telescopic safety compass needle device is simple in structure, stable in operation and convenient to operate.

Drawings

The foregoing technical disclosure as well as the following detailed description of the present invention will be better understood when read in conjunction with the appended drawings. It is to be noted that the figures are only intended as examples of the claimed solution. In the drawings, like reference characters designate the same or similar elements.

FIG. 1 is a perspective view of a safety compass needle assembly in accordance with one embodiment of the present invention;

FIG. 2 is an exploded view of a safety compass needle assembly in accordance with an embodiment of the present invention;

FIG. 3 is a longitudinal cross-sectional view of a safety compass needle assembly in accordance with an embodiment of the present invention;

FIG. 4 is a six-sided view of a safety compass needle assembly in accordance with an embodiment of the present invention.

Wherein the reference numerals are as follows:

1 needle bar casing

2 limiting sliding groove

3 compasses supporting legs

4 compasses needle point

5 compasses needle

6 limit salient points

7 knob buckle

8 guide groove

9 knob

Detailed Description

The detailed features and advantages of the utility model are described in the following detailed description, which is sufficient to enable one skilled in the art to understand the technical content of the utility model and to implement the utility model, and the related objects and advantages of the utility model can be easily understood by one skilled in the art from the description, the claims and the accompanying drawings.

It is noted that the terms "upper", "lower", "top", "bottom", and the like are used herein with reference to the normal vertical orientation of the compass.

As shown in fig. 1 and 2, in one embodiment, the safety compass needle device includes a needle bar housing 1, a compass needle 5, and a guide mechanism.

The needle bar shell 1 is a hollow cylinder.

The compass needle 5 is provided inside the needle bar housing 1 and the guide mechanism. The side wall of the compass needle 5 is provided with a limit salient point 6. The position-limiting protrusions 6 may preferably be cylindrical or may have other shapes.

The guide mechanism is rotatably fitted in the needle bar housing 1, that is to say the guide mechanism can rotate relative to the needle bar housing 1 but remains longitudinally fixed relative to the needle bar housing 1.

The guide groove 8 is a through groove longitudinally arranged on the side wall of the guide mechanism. The width of the guide groove 8 is slightly larger than the diameter of the limit projection 6, so that the limit projection 6 is slidably received in the guide groove 8. The upper half section of the guide groove 8 is a spiral section through groove which is approximately a circle (or other required lengths) around the guide mechanism, and the lower half section of the guide groove is a straight-line section through groove. The limiting salient points 6 are assembled into the guide grooves 8 through the straight-line-section through grooves and move in the spiral-section through grooves. The needle bar housing 1 is provided on the inner wall thereof with a limit chute 2 in the longitudinal direction, and a limit projection 6 projects into the limit chute 2 and can slide therein, thereby guiding the compass needle 5 to slide in the longitudinal direction of the needle bar housing 1 and preventing the compass needle 5 from rotating relative to the needle bar housing 1. The user changes the contact position of guide way 8 and spacing bump 6 through rotatory guiding mechanism and simultaneously through spacing spout 2 to the spacing guide effect of spacing bump 6, also is that spacing bump 6 slides along the guide way 8 of spacing spout 2 and helical segment simultaneously to make compasses needle 5 remove for needle bar shell 1, and then make compasses needle point 4 stretch out or pack up.

The top end of the guide mechanism is provided with a knob 9, the outer diameter of the knob is larger than that of the guide mechanism, and the knob is convenient for a user to hold to rotate the guide mechanism. The periphery of the knob is provided with a plurality of longitudinal grooves for increasing holding friction force.

The guide mechanism is assembled on the needle bar shell 1 through a knob buckle 7, the knob buckle 7 is a circumferential buckle arranged at the bottom of the guide mechanism and is jointed with the bottom end of the needle bar shell 1, so that the guide mechanism can be rotationally fixed relative to the needle bar shell 1.

As shown in FIG. 4, the safety compass needle device can be fixed at the tail end of one compass support leg of the compasses, so that the safety compasses are formed.

The terms and expressions which have been employed herein are used as terms of description and not of limitation. The use of such terms and expressions is not intended to exclude any equivalents of the features shown and described (or portions thereof), and it is recognized that various modifications may be made within the scope of the claims. Other modifications, variations, and alternatives are also possible. Accordingly, the claims should be looked to in order to cover all such equivalents.

Also, it should be noted that although the present invention has been described with reference to the current specific embodiments, it should be understood by those skilled in the art that the above embodiments are merely illustrative of the present invention, and various equivalent changes or substitutions may be made therein without departing from the spirit of the present invention, and therefore, it is intended that all changes and modifications to the above embodiments within the spirit of the present invention shall fall within the scope of the appended claims.

Claims

1. A safe compass needle device, characterized in that, safe compass needle device includes needle bar shell (1), locate in the needle bar shell (1) and can be for needle bar shell longitudinal movement's compass needle (5) and rotatably assemble in the guide mechanism in needle bar shell (1), compass needle (5) with the guide mechanism cooperatees and makes through rotating the guide mechanism realizes the longitudinal movement of compass needle (5) for needle bar shell (1), thereby makes compass needle point (4) at compass needle (5) top stretch out or retract the needle bar shell (1).

2. A safety compass needle device according to claim 1, wherein the compass needle (5) is provided at a side wall thereof with a limit projection (6), the needle bar housing (1) is provided at an inner wall thereof with a limit slide groove (2) in a longitudinal direction, the limit projection (6) projects into the limit slide groove (2) and is slidable therein so as to guide the compass needle (5) to slide in the longitudinal direction of the needle bar housing (1) and prevent the compass needle (5) from rotating relative to the needle bar housing (1), and the limit projection (6) is engaged with the guide mechanism.

3. A safety compass needle device according to claim 2, wherein the guide means is a hollow cylinder, the outer diameter of the guide means being smaller than the inner diameter of the needle bar housing (1), the inner diameter of the guide means being larger than the diameter of the compass needle (5), the compass needle (5) being accommodated within the guide means.

4. A safety compass needle device according to claim 3, wherein the guide mechanism is provided with a guide groove (8) having a width greater than that of the limit projection (6), the limit projection (6) projects into the limit chute (2) through the guide groove (8), the guide groove (8) contains a spiral section surrounding the guide mechanism, and rotation of the guide mechanism causes the limit projection (6) to simultaneously slide along the limit chute (2) and the guide groove (8) of the spiral section, thereby causing the compass needle (5) to move longitudinally relative to the needle bar housing (1).

5. A safety compass needle device according to claim 4, wherein the upper half of the guide slot (8) is the helical portion around the guide mechanism and the lower half of the guide slot (8) is a straight line portion.

6. The safety compass needle device of claim 1, wherein the guide mechanism has a knob (9) at a top end thereof, the knob (9) having an outer diameter greater than an outer diameter of the guide mechanism, the knob (9) being adapted to be held by a user for rotating the guide mechanism.

7. The safety compass needle device of claim 6, wherein the knob (9) is peripherally provided with a plurality of longitudinal grooves for increasing grip friction.

8. The safety compass needle device of claim 1, wherein the guide mechanism is assembled to the needle bar housing (1) by a knob catch (7), the knob catch (7) being a circumferential catch provided at a bottom of the guide mechanism, thereby enabling rotatable fixation of the guide mechanism relative to the needle bar housing (1).

9. A safety compass, characterized by comprising two compass support legs (3) and a safety compass needle device according to any one of claims 1-8, the needle bar housing (1) of the safety compass needle device being fixed at the end of one of the compass support legs (3).