TWM607250U - Compass - Google Patents

Abstract

A compass includes a brush mechanism, a needle tube mechanism including a needle tube, and a pressing and positioning mechanism. The pressing and positioning mechanism includes a pressing needle unit and a positioning unit. The pressing needle unit has a pressing rod and a stitch connected up and down. The positioning unit has a positioning shaft pivoted on a shaft fixing member. The pressing rod can be pressed to move downward and push to drive the positioning shaft to elastically pivot relative to the shaft fixing member, so as to be able to change to a protruding stitch. Extend the needle state of the needle tube. With the setting of the pressing and positioning mechanism, the pressing rod can be pressed to make the stitch protruding when the compass is used, which can prevent the stitch from being kept in the state of being exposed to the needle tube all the time, increasing the safety in use.

Description

Compass

This model relates to a drawing instrument, especially a drawing instrument with a circular curve.

As a common circle drawing tool, the compass has been widely used in the field of drawing or teaching. The general compass includes a pen and a compass needle. The pen and the compass needle can be manipulated to swing relatively to adjust the expected circle. radius. However, in the process of taking the compasses, it is easy to be punctured by the exposed needles of the compasses, resulting in a safety problem.

Therefore, the purpose of the present invention is to provide a compass that can at least overcome the disadvantages of the prior art.

Therefore, the compass of the present invention includes a brush mechanism, a needle tube mechanism, and a pressing and positioning mechanism. The needle tube mechanism can be pivotally mounted on the brush mechanism and includes a needle tube extending up and down. The pressing and positioning mechanism is arranged on the needle tube mechanism, and includes a pressing needle unit and a positioning unit that can be inserted up and down in the needle tube. The pressing needle unit has a pressing rod for operation and pressing, a stitch connected below the pressing rod, and an elastic member installed between the needle tube and the pressing rod, and the elastic member constantly provides the pressing rod with an opposite The elastic force that the needle tube moves upward.

The positioning unit has a rotating shaft fixing part arranged outside the needle tube, and a positioning rotating shaft pivoted on the rotating shaft fixing part. The pressing rod can be driven to drive the needle to move downward relative to the needle tube and compress the elastic part, The positioning shaft will be pushed and driven by the pressing rod that moves down relatively to pivot elastically relative to the shaft fixing member, so that the pressing rod can be driven to a needle state in which the needle protrudes out of the needle tube, and When the pressing rod changes to the needle state and is out of the driving of the pressing rod, it is reversely elastically pivoted and reset, and the pressing rod pushed up by the elastic member is restricted in the needle state.

The effect of the present invention is that by the setting of the pressing and positioning mechanism, when the compass is to be used, the pressing rod can be pressed to make the stitch protrude out of the needle tube, which can prevent the stitch from always being exposed to the needle tube. In order to increase the safety of use.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are represented by the same numbers.

1 to 3, the first embodiment of the new compass includes a brush mechanism 1, a needle tube mechanism 2, a pressing and positioning mechanism 3, and a compass head 8. The brush mechanism 1 of the first embodiment is a push-type mechanical pencil. Since the push-type mechanical pencil is a conventional component and is not the focus of the invention, it will not be repeated. The brush mechanism 1 and the needle tube mechanism 2 are pivoted on the compass head 8 so as to be relatively pivotable. The needle tube mechanism 2 includes a needle tube 21 extending up and down and a fixed cover 22 covering the needle tube 21 and having a perforation. The needle tube 21 is provided with an opening 20 extending up and down. The pressing and positioning mechanism 3 is disposed on the needle tube mechanism 2 and includes a pressing needle unit 4 and a positioning unit 5 that can be inserted up and down in the needle tube 21.

The pressing needle unit 4 has a pressing rod 41 that can be operated and pressed, a pin 42 connected below the pressing rod 41, an elastic member 43 installed between the needle tube 21 and the pressing rod 41, and the upper and lower spaces are arranged at intervals. A first driving block 44 and a second driving block 45 on the outer circumference of the pressing rod 41 and exposed in the opening 20 of the needle tube 21. The pressing rod 41 is inserted into the needle tube 21 and penetrates the through hole of the fixing cover 22 upward. The elastic member 43 constantly provides an elastic force for the pressing rod 41 to move upward relative to the needle tube 21. The positioning unit 5 has a rotating shaft fixing member 6 arranged outside the needle tube 21 and a positioning rotating shaft 7 pivoted on the rotating shaft fixing member 6. The rotating shaft fixing member 6 is provided with a first limiting wall 61 and a second limiting wall 62 respectively located on two opposite sides of the positioning rotating shaft 7 in the radial direction.

4, the positioning shaft 7 has a shaft body 71 pivoted on the shaft fixing member 6, and a first protrusion 72 and a first protrusion 72 and a first block provided on the outer circumference of the shaft body 71 and opposite to the opening 20. Two bumps 73. The first protrusion 72 has an upper sliding surface 74 extending obliquely up and down around the shaft body 71, and a first side surface 75 and a second side surface 76 respectively extending downward from opposite sides of the upper sliding surface 74 . The first side surface 75 has a first inclined surface 751 connected to the upper sliding surface 74 and extending obliquely downward from the rotating shaft fixing member 6 toward the pressing rod 41, and a first inclined surface 751 connected to the first inclined surface 751 and extending toward A first abutting surface 752 extending downward.

The second side surface 76 has a second abutting surface 762 connected to the upper sliding surface 74 and extending downward, and a second abutting surface 762 connected to the second abutting surface 762 and extending from the pressing rod 41 to the shaft fixing member A second inclined surface 761 extending diagonally downward in the direction of 6. The bottom side of the first protrusion 72 has a groove top surface 77 extending obliquely upward, and a blocking surface 78 connected to the top of the groove top surface 77 and extending downward. The second protrusion 73 is located above the first protrusion 72 and has an auxiliary surface 731 that is inclined up and down and whose inclination direction is opposite to that of the upper sliding surface 74.

Referring to Figures 5 to 6, in the first embodiment, the needle 42 can be retracted into the needle tube 21 by pressing the pressing rod 41, and the needle 42 can protrude downward from the needle tube 21. Change between needle states. To operate the first embodiment to change from the narrowed needle state to the closed needle state, press the pressing rod 41 to move downward relative to the needle tube 21 and compress the elastic member 43, and drive the first drive block 44 to lean down Abutting on the upper sliding surface 74 of the first protrusion 72, the abutted first driving block 44 will slide down along the upper sliding surface 74 and drive the positioning shaft 7 to pivot to an elastic support Abutting against the first deflection position of the first limiting wall 61, therefore, the first driving block 44 can be transformed from the bottom end of the upper sliding surface 74 to abutting against the first side surface 75 and continue to move downward. When the first driving block 44 slides along the first inclined surface 751 of the first side surface 75 to the first abutting surface 752, it will simultaneously elastically push the rotating shaft fixing member 6 away from the needle tube 21. Swing until the first driving block 44 leaves the first abutment surface 752 and detaches from the first protrusion 72 downwards, the shaft fixing member 6 will rebound toward the needle tube 21, and at the same time cooperate with the positioning shaft 7 by The first deflection position is elastically pivoted to reset, and the first driving block 44 is constrained in the pin position, because the first driving block 44 is constrained by the groove top surface 77 and the blocking surface 78 together. Below the first protrusion 72, the compass can be stably constrained in the needle state.

Referring to Figures 7 to 8, when the first embodiment is to be operated to change from the needle state to the narrow state, press the pressing rod 41 downward to drive the second driving block 45 to abut against the second convex The auxiliary surface 731 of the block 73, the second driving block 45 slides down along the auxiliary surface 731 and drives the positioning shaft 7 to pivot to a second deflection position elastically abutting against the second limiting wall 62, Then release the pressing rod 41 to allow the pressing rod 41 to move upward by the elastic force of the elastic member 43 and drive the stitch 42 to retract into the needle tube 21 and drive the first driving block 44 along the second side surface 76 slips up. When the first driving block 44 slides along the second inclined surface 761 to the second abutting surface 762, it will simultaneously elastically push the rotating shaft fixing member 6 to deflect away from the needle tube 21 until the first The driving block 44 leaves the second abutting surface 762 and detaches upward from the first protrusion 72, the rotating shaft fixing member 6 will rebound in the direction of the needle tube 21, and at the same time, in conjunction with the positioning of the positioning shaft 7 from the second The deflection position is elastically pivoted to reset, and the first protrusion 72 is rotated to below the first driving block 44, so that the compass is in the narrowing state.

Referring to FIG. 9, the difference between the second embodiment of the new compass and the first embodiment lies in the structure of the brush mechanism 1. The brush mechanism 1 of the first embodiment is a push-type mechanical pencil, and the brush mechanism 1 of the second embodiment includes a pen holder 11 that can pivot relative to the needle tube mechanism 2, and a pen holder 11 inserted in the pen holder 11 The tube 12, a pen core 13 inserted in the pen tube 12, and two sleeves 14 screwed up and down on the outer peripheral surface of the pen tube 12, respectively. The pen tube 12 is provided with an external thread 121 on the outer peripheral surface, and each sleeve 14 is provided with an internal thread 141 on the inner peripheral surface. The user can adjust the position of the pen tube 12 relative to the pen holder 11 according to requirements, and then separate the The sleeve 14 is sleeved up and down and screw-locked to the pen tube 12, and the pen tube 12 is locked on the pen holder 11.

To sum up, the new type of compass is provided with the pressing and positioning mechanism 3. When the compass is to be used, the pressing rod 41 can be pressed to make the stitch 42 protrude from the needle tube 21. After use, press the pressing rod again 41 can be changed to retract the pin 42 into the needle tube 21 to prevent the pin 42 from being exposed to the needle tube 21 all the time, which is not only convenient for operation, but also safe for use.

However, the above-mentioned are only examples of the present model, and should not be used to limit the scope of implementation of the present model, all simple equivalent changes and modifications made in accordance with the patent scope of the present model application and the contents of the patent specification still belong to This new patent covers the scope.

1: Brush mechanism 11: Pen holder 12: Pen tube 121: External thread 13: Refill 14: casing 141: Internal thread 2: Needle tube mechanism 20: Hole 21: Needle tube 22: fixed cover 3: Press positioning mechanism 4: Press the needle unit 41: Press lever 42: Pin 43: elastic parts 44: The first drive block 45: second drive block 5: Positioning unit 6: Rotating shaft fixing parts 61: The first limit wall 62: second limit wall 7: Positioning shaft 71: Shaft body 72: The first bump 73: second bump 731: auxiliary surface 74: upper sliding surface 75: first side 751: first slope 752: The first contact surface 76: second side 761: second slope 762: second contact surface 77: Groove top surface 78: Blocking surface 8: Compass head

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a perspective view showing that the first embodiment of the new compass is in a narrowing state; Figure 2 is a perspective view illustrating the first embodiment in a pinned state; Figure 3 is a partially enlarged exploded view illustrating a needle tube mechanism and a pressing and positioning mechanism of the first embodiment; Figure 4 is a perspective view illustrating a positioning shaft of the first embodiment; Figure 5 is a schematic diagram illustrating the first embodiment from a narrowing state to a closed needle state; Figure 6 is a top sectional view illustrating that the positioning shaft of the first embodiment is located at a first deflection position; FIG. 7 is a schematic diagram illustrating the change of the first embodiment from the closed needle state to the narrowed needle state; Figure 8 is a top cross-sectional view illustrating that the positioning shaft of the first embodiment is at a second deflection position; and Figure 9 is a perspective view illustrating the second embodiment of the new compass.

1: Brush mechanism

2: Needle tube mechanism

21: Needle tube

22: fixed cover

3: Press positioning mechanism

4: Press the needle unit

41: Press lever

5: Positioning unit

6: Rotating shaft fixing parts

8: Compass head

Claims (7)

A compass, containing: A brush mechanism A needle tube mechanism, including a needle tube extending up and down; and A pressing and positioning mechanism is arranged on the needle tube mechanism and includes a pressing needle unit that can be movably inserted into the needle tube and a positioning unit. The pressing needle unit has a pressing rod for operation and pressing, and a pressing rod connected to the needle tube. The needle under the pressing rod, and an elastic member installed between the needle tube and the pressing rod, the elastic member constantly provides an elastic force for the pressing rod to move upward relative to the needle tube, and the positioning unit has a positioning unit disposed on the needle tube The outer shaft fixing member and a positioning shaft pivoted on the shaft fixing member. The pressing rod can be pressed to drive the pins to move downward to make the elastic member produce elastic deformation, and push the positioning shaft relative to the The shaft fixing member is elastically pivoted and can be changed to a needle state where the needle protrudes out of the needle tube. When the positioning shaft is separated from the drive of the pressing rod, it will be reversely pivoted and reset, and will be reset by the elastic force. The pressing rod that is driven upwards is limited in the needle position. The compass according to claim 1, wherein the pressing rod in the needle state can be operated to drive the stitch to move down relative to the needle tube, and the positioning shaft will be driven by the pressing rod that moves down relatively to the shaft The elastic pivoting change of the fixing member does not prevent the pressing rod from moving upward, and the pressing rod is elastically pivoted and reset when the pressing rod is elastically pushed up by the elastic member to the narrowed state where the stitch is retracted into the needle tube. The compass according to claim 2, wherein the rotating shaft fixing member is provided with a first limiting wall and a second limiting wall respectively located on opposite sides of the positioning rotating shaft in the radial direction, which are located in the narrowing state The pressing rod can be pressed and driven to drive the positioning shaft to deflect to a first deflection position that elastically abuts against the first limiting wall. The pressing rod in the pin position can be pressed and driven to drive the positioning shaft reversely. Deflection to a second deflection position elastically abutting against the second limiting wall. The compass according to claim 3, wherein the needle tube is provided with an opening extending up and down, and the pressing needle unit further has a first driving block and a first driving block which are arranged on the pressing rod and exposed to the opening at intervals. Two driving blocks, the positioning shaft has a shaft body pivoted on the shaft fixing member, and a first protrusion and a second protrusion provided on the shaft body and opposite to the opening, the first protrusion An upper sliding surface extending up and down around the shaft body is provided. The second protrusion is located above the first protrusion and has an auxiliary surface that is inclined up and down and whose inclination direction is opposite to that of the upper sliding surface , When the pressing lever in the narrowing state is operated to change the needle state, the first driving block can be driven to slide down along the upper sliding surface, and push the positioning shaft to the first In the deflection position, when the pressing lever in the needle position is operated to move down relative to the needle tube, the second driving block can be driven to slide down along the auxiliary surface, and the positioning shaft is pivotally transformed to The second deflection position. The compass according to claim 4, wherein the first protrusion further has a first side surface extending downward from one side of the upper sliding surface, and the first side surface has a first side surface connected to the upper sliding surface And along the first inclined surface extending obliquely downward from the rotating shaft fixing member to the pressing rod, and a first abutting surface connected to the first inclined surface and extending downward, the needle is changed from the narrowing state to the needle During the state, the first driving block that moves downward will abut the first inclined surface and the first abutting surface successively to elastically push the rotating shaft fixing member in a direction opposite to the pressing rod, and the rotating shaft fixing member When the first driving block falls away from the first protrusion, it rebounds so that the positioning shaft and the first driving block abut against each other. The compass according to claim 5, wherein the first protrusion further has a second side surface extending downward from a side of the upper sliding surface opposite to the first side surface, and the second side surface has a connection A second abutting surface extending downward on the upper sliding surface, and a second inclined surface connected to the second abutting surface and extending obliquely from the pressing rod to the shaft fixing member, from the In the process of changing the needle state to the narrowing state, the first driving block that moves upward will abut against the second inclined surface and the second abutting surface successively, so that the rotating shaft fixing member moves in a direction opposite to the pressing rod When pushed elastically, the rotating shaft fixing member will rebound when the first driving block is lifted away from the first protrusion, so that the first protrusion is reset to below the first driving block. The compass according to claim 5 or 6, wherein the bottom side of the first protrusion has a top surface of the groove extending obliquely upward, and a stop surface connected to the top of the top surface of the groove and extending downward.

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