A compass with a sheath

Abstract

The present invention discloses a compass with a sheath, comprising a first leg, a second leg, a handle assembly, a compass lead, and a positioning pin. The first leg and the second leg are both connected to the handle assembly. A sheath is slidably fitted on the first leg, and a driving member is provided on the second leg. The driving member is used to drive the sheath to slide back and forth on the first leg to protect or expose the compass lead and positioning pin. The sheath of the compass with a sheath is connected to the compass and will not be lost. The structure is simple and the compass is easy to use.

Description

Technical Field

[0001] The present invention relates to the technical field of learning tools, and more specifically to a compass with a sheath. Background Art

[0002] Compasses are a learning tool that every student uses. However, if misplaced or dropped, the compass tip can prick someone, bend, or break, causing injury or damage. To address these issues, compasses with protective covers have become available. These covers are attached to the compass needle and protect the tip when not in use, effectively resolving these issues. However, conventional compasses with protective covers can be separated from the needle, making them prone to frequent handling and loss. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a compass with a sheath, wherein the sheath of the compass with the sheath is connected to the compass and will not be lost, and the compass has a simple structure and is easy to use.

[0004] The technical solution of the present invention is to provide a compass with a sheath having the following structure, including a first leg, a second leg, a rotating handle assembly, a compass lead and a positioning pin; the first leg and the second leg are both connected to the rotating handle assembly; the first leg is slidably fitted with a sheath, and the second leg is provided with a driving member, and the driving member is used to drive the sheath to slide back and forth on the first leg to protect or expose the compass lead and positioning pin of the compass.

[0005] After adopting the above structure, the compass with a sheath of the present invention has the following advantages compared with the prior art:

[0006] Since the sheath is slidably fitted on the first leg of the compass with the sheath of the present invention, and a driving member is provided on the second leg, when the first leg and the second leg are closed or separated, the driving member can drive the sheath to slide back and forth on the first leg to protect or expose the compass lead and positioning pin of the compass. The compass is very convenient to use, and the sheath is connected to the first leg and is not easy to lose.

[0007] As an improvement, the first leg and the sheath are slidably matched via a slideway and a protrusion structure. With this structure, the structure is simple and the connection is convenient.

[0008] As an improvement, the sheath is sheathed outside the first leg, the slide is provided on the sheath, the protrusion is provided on the outer wall of the first leg, and the protrusion fits in the slide. This structure is simple and easy to connect.

[0009] As an improvement, the driving member is provided with an inclined surface, and the sheath is provided with a contact surface. When the driving member contacts the sheath, the inclined surface and the contact surface interfere with each other, and the driving member pushes the sheath to slide toward the compass lead and the positioning needle. A return elastic member is provided between the sheath and the first leg. When the driving member and the sheath are separated, the return elastic member pushes the sheath to slide away from the compass lead and the positioning needle. With this structure, the driving member and the sheath are driven by the inclined surface, which is simple, reliable, and easy to use.

[0010] As an improvement, a side hole is provided on the side of the first leg, with an opening on one side of the side hole being adjacent to the driving member; a resisting member is provided within the sheath, extending into the side hole, and a resisting surface is provided on a side of the resisting member adjacent to the driving member; and a return elastic member is provided between the resisting member and the inner wall of the side hole. This structure is simple and easy to assemble.

[0011] As an improvement, the return elastic member is a return spring, a positioning column is provided in the side hole, and the return spring is sleeved outside the positioning column. With this structure, the structure is simple and reliable.

[0012] As an improvement, guard plates are provided on both sides of the lower end of the sheath. When the sheath slides toward the compass lead and the positioning needle to a certain position, the guard plates shield the compass lead and the positioning needle. With this structure, the guard plates protect the compass lead and the positioning needle, which is simple in structure and easy to use.

[0013] As an improvement, the first leg is a compass leg, and a positioning pin is provided at the lower end of the compass leg; the second leg is a circular support leg, and a compass lead is provided at the lower end of the circular support leg. After adopting this structure, the sheath is provided on the compass leg, and the structural design is more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The diagram is a schematic diagram of the exploded structure of the compass with a sheath and the sheath of the present invention.

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the sheath of the compass with a sheath of the present invention.

[0016] Figure 3 It is a side structural schematic diagram of the sheath of the compass with a sheath of the present invention.

[0017] Figure 4 It is a schematic structural diagram of the compass leg and the round support leg of the compass with a sheath of the present invention after being folded together.

[0018] Figure 5It is a schematic structural diagram of the compass legs and the round support legs of the compass with a sheath of the present invention after being folded together (partial perspective).

[0019] Figure 6 It is a schematic structural diagram (partial perspective) of the compass with a sheath of the present invention after the compass legs and the round support legs are separated.

[0020] Shown in the figure: 1. Compass leg, 101. Side hole, 102. Bump, 2. Round support leg, 3. Positioning pin, 4. Compass lead, 5. Sheath, 501. Side plate, 502. Connecting plate, 503. Resistance member, 504. Slide, 505. Resistance surface, 506. Guard plate, 507. Opening, 6. Driving member, 601. Inclined surface, 7. Positioning column, 8. Return spring. DETAILED DESCRIPTION

[0021] In order to better understand the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0022] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0023] It should also be understood that the terms "comprising," "including," "having," "includes," and "containing," when used in this specification, indicate the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof. Furthermore, expressions such as "...at least two," when appearing after a list of listed features, modify the entire list, rather than the individual elements in the list.

[0024] like Figures 1 to 6 As shown, the present invention discloses a compass with a sheath, comprising a first leg, a second leg and a handle assembly. The first leg and the second leg are both connected to the handle assembly. The first leg is a compass leg 1 or a circular leg 2, and correspondingly, the second leg is a circular leg 2 or a compass leg 1. In this specific embodiment, the first leg is a compass leg 1, and the second leg is a circular leg 2. The connection relationship between the compass leg 1 and the circular leg 2 and the handle assembly is prior art and will not be repeated here. A positioning pin 3 is provided at the lower end of the compass leg 1; a compass lead 4 is provided at the lower end of the circular leg 2.

[0025] The compass leg 1 is slidably fitted with a sheath 5, and the compass leg 2 is provided with a driving member 6, which is used to drive the sheath 5 to slide back and forth on the compass leg 1 to protect or expose the compass lead 4 and positioning needle 3 of the compass.

[0026] The side wall of the compass leg 1 is provided with a side hole 101, which is opened horizontally, with one side opening of the side hole 101 adjacent to the circular leg 2. The driving member 6 on the circular leg 2 can be inserted into the side hole 101. The driving member 6 is provided with an inclined surface 601 on the side adjacent to the compass leg 1. The inclined surface 601 gradually approaches the circular leg 2 from the upper end to the lower end of the driving member 6. A protrusion 102 is provided on the outer side of both side walls of the compass leg 1 at the position corresponding to the side hole 101.

[0027] The sheath 5 comprises two opposing side panels 501 and a connecting plate 502 connected to the front of the two side panels 501. An inner cavity is formed between the two side panels 501 and the connecting plate 502. A resisting member 503 is provided at the upper end of the connecting plate 502, located within the upper end of the inner cavity. Two resisting members 503 are provided and arranged parallel to each other. Slideways 504 are provided on each of the two side panels 501. The sheath 5 is fitted over the lower end of the compass leg 1. The protrusions 102 on either side of the compass leg 1 fit into the slideways 504 on the two side panels 501, and the resisting members 503 extend into the side hole 101. The sheath 5 is able to slide back and forth along the length of the compass leg 1 due to the action of the protrusions 102 and the slideway 504. A positioning post 7 is provided on the inner wall of the lower side of the side hole 101. The upper end of the positioning post 7 can pass between the two resisting members 503. A return elastic member is provided between the resisting member 503 and the inner wall of the lower side of the side hole 101. The return elastic member is a return spring 8, which is sleeved on the outside of the positioning column 7. A resisting surface 505 is provided on the side of the resisting member 503 close to the driving member 6. The resisting surface 505 matches the inclined surface 601 of the driving member 6.

[0028] The lower end of the sheath 5 is provided with guard plates 506 on both sides. The guard plates 506 can block the positioning pin 3 and the compass lead 4 on both sides. The lower side of the connecting plate 502 is also provided with an opening 507. When the sheath 5 slides toward the positioning pin 3, the opening 507 allows the positioning pin 3 to pass through. The shape of the sheath 5 is similar to an "L" shape.

[0029] The working principle of the compass with sheath of the present invention is as follows:

[0030] When the compass leg 1 and the circular support leg 2 slowly close together, the inclined surface 601 of the driving member 6 conflicts with the contact surface 505 of the resistance member 503. As the compass leg 1 and the circular support leg 2 slowly move closer, the driving member 6 gradually extends into the side hole 101 and gradually pushes the resistance member 503 to move toward the positioning needle 3. The return spring 8 is also gradually compressed until after sliding a certain distance, the guard plate 506 blocks the positioning needle 3 and the compass lead 4.

[0031] When the compass leg 1 and the circular support leg 2 are slowly opened, the driving member 6 slowly contacts the resistance member 503, and the sheath 5 gradually moves away from the positioning pin 3 until the driving member 6 leaves the side hole, and the sheath 5 returns to its original position, and the positioning pin 3 and the compass lead 4 are exposed outside the guard plate 506.

Claims

1. A compass with a sheath, comprising a first leg, a second leg, a handle assembly, a compass lead, and a positioning pin; the first leg and the second leg are both connected to the handle assembly; characterized in that: The first leg is slidably fitted with a sheath, and the second leg is provided with a driving member, the driving member being used to drive the sheath to slide back and forth on the first leg to protect or expose the compass lead and positioning needle of the compass; The first leg and the sheath are slidably engaged with each other through a structure of a slideway and a protrusion; The sheath is sheathed over the first leg, the slide is provided on the sheath, the protrusion is provided on the outer side wall of the first leg, and the protrusion fits in the slide; The driving member is provided with an inclined surface, and the sleeve is provided with a resistance surface. When the driving member contacts the sleeve, the inclined surface and the resistance surface conflict with each other, and the driving member pushes the sleeve to slide in the direction of the compass lead and the positioning needle; a return elastic member is provided between the sleeve and the first leg. When the driving member is separated from the sleeve, the return elastic member pushes the sleeve to slide away from the compass lead and the positioning needle; Both sides of the lower end of the sheath are provided with guard plates. When the sheath slides to a certain position in the direction of the compass lead and the positioning needle, the guard plates cover the compass lead and the positioning needle.

2. The compass with a sheath according to claim 1, characterized in that: A side hole is provided on the side of the first leg, and an opening on one side of the side hole is close to the driving member; a resistance member is provided in the sheath, and the resistance member extends into the side hole, and the resistance surface is provided on the side of the resistance member close to the driving member; the return elastic member is provided between the resistance member and the inner wall of the side hole.

3. The compass with a sheath according to claim 2, characterized in that: The return elastic member is a return spring, a positioning column is provided in the side hole, and the return spring is sleeved outside the positioning column.

4. The compass with a sheath according to any one of claims 1 to 3, characterized in that: The first leg is a compass leg, and a positioning pin is provided at the lower end of the compass leg; the second leg is a circular support leg, and a compass lead is provided at the lower end of the circular support leg.

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