CN217124375U - Cam type automatic pen structure - Google Patents

Abstract

The utility model relates to a cam-type automatic pen structure, including the pen socket, set up the end cap at the pen socket tip, place the refill bar in the pen socket, the tip of refill bar is equipped with the refill head, the spring is established to the upper cover of refill bar, the top of pen socket is equipped with the adjustment mechanism that controls the refill bar and stretch out and draw back, adjustment mechanism includes the installation head that fixedly sets up at the pen socket top, be equipped with first gear, second gear and cam on the installation head, first gear, second gear and cam are through pivot fixed connection, the both ends of pivot are connected with the installation head rotation; the pen core rod is characterized in that one end, far away from the pen core head, of the pen core rod is connected with a telescopic sleeve, one end, close to the cam, of the telescopic sleeve is provided with a protrusion, the circumferential surface of the cam is provided with a positioning clamping groove, the positioning clamping groove corresponds to the protrusion, and the distance between the center of the rotating shaft and the positioning clamping groove is larger than the distance between the center of the rotating shaft and the protrusion. The structure controls the stretching of the refill head through the continuity rotation of the cam, the refill head is stably supported, the stretching continuity is good, and the problem of stretching and clamping is avoided.

Description

Cam type automatic pen structure

Technical Field

The utility model belongs to the technical field of the writing instrument and specifically relates to a cam-type is from moving pen structure is related to.

Background

Ball-point pens are pens in which the writing medium is carried out by rolling a ball at the front end of the pen or refill. A ball-point pen is a pen using a minute rotary ball made of brass, steel or tungsten carbide, which releases ink onto paper when writing.

Present ballpoint pen structure mainly includes the pen socket, sets up the flexible control structure that presses of refill and control refill in the pen socket, and current ballpoint pen structure exists refill support unstability and the flexible incoherent problem of refill when in-service use, and this patent improves the ballpoint pen structure based on current technical problem.

Disclosure of Invention

The utility model aims at solving the defects existing in the prior art and providing a cam type automatic pen structure.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a cam type automatic pen structure comprises a pen cap, an end cap, a pen core rod, a pen core head, a port, a spring, a boss, an adjusting mechanism, a mounting head, a cam, a rotating shaft and a rotating shaft, wherein the end cap is arranged at the end part of the pen cap and is in threaded connection with the pen cap;

one end of the pencil core rod, which is far away from the pencil core head, is connected with a telescopic sleeve, one end of the telescopic sleeve, which is close to the cam, is provided with a bulge, and the bulge is in contact with the circumferential surface of the cam.

Further, the cam is eccentrically mounted on the rotating shaft.

Furthermore, a positioning clamping groove is formed in the circumferential surface of the cam and corresponds to the protrusion, and the distance between the center of the rotating shaft and the positioning clamping groove is larger than the distance between the center of the rotating shaft and the protrusion.

Furthermore, the rotating shaft penetrates through the centers of the first gear and the second gear.

Furthermore, an elastic hook is arranged on the mounting head.

Further, the protrusion and the telescopic sleeve are integrally formed.

The utility model has the advantages that: when the structure is used for controlling the extension and retraction of the refill head, a hand rotates the first gear and the second gear, the first gear and the second gear drive the cam to rotate through the rotating shaft, the end of the refill rod, which is far away from the refill head, is connected with the telescopic sleeve, the end of the telescopic sleeve, which is close to the cam, is provided with a bulge, the bulge is in contact with the peripheral surface of the cam, the peripheral surface of the cam is provided with a positioning clamping groove, the positioning clamping groove corresponds to the bulge, the distance between the center of the rotating shaft and the positioning clamping groove is greater than the distance between the center of the rotating shaft and the bulge, when the positioning clamping groove of the cam is matched with the bulge at the end part of the telescopic sleeve, the cam applies extrusion force to the telescopic sleeve, at the moment, the refill head extends out from the port of the end cap, after the cam is continuously rotated, the cam gradually releases the extrusion force to the telescopic sleeve, the telescopic sleeve drives the refill head to retract into the end cap under the elastic action of the spring, and the structure controls the extension and retraction of the refill head through the continuous rotation of the cam, the refill head is stable in support, good in telescopic consistency and free of the problem of telescopic blocking.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic side view of the present invention;

fig. 3 is a schematic cross-sectional view of the present invention.

Detailed Description

As shown in fig. 1 to 3, a cam-type automatic pen structure comprises a pen cap 1, an end cap 2 disposed at an end of the pen cap 1 and connected to the pen cap 1 by a screw thread, a pen core rod 3 disposed in the pen cap 1, a pen core head 4 disposed at an end of the pen core rod 3, a port of the end cap 2 near the pen core head 4, a spring 5 sleeved on the pen core rod 3, one end of the spring 5 supported on a shoulder nail of the pen core rod 3, the other end of the spring 5 supported on a boss inside the pen cap 1, an adjusting mechanism disposed at a top of the pen cap 1 for controlling the pen core rod 3 to extend and retract, the adjusting mechanism comprising a mounting head 6 fixedly disposed at the top of the pen cap 1, an opening 7 disposed at a middle portion of the mounting head 6, a first gear 8 and a second gear 9 disposed at the opening 7, a cam 10 disposed between the first gear 8 and the second gear 9, and a first gear 8, the second gear 9 and the cam 10 are fixedly connected through a rotating shaft 11, and two ends of the rotating shaft 11 are rotatably connected with the mounting head 6;

the end of the pen core rod 3 far away from the pen core head 4 is connected with a telescopic sleeve 12, one end of the telescopic sleeve 12 close to the cam 10 is provided with a bulge 13, and the bulge 13 is contacted with the circumferential surface of the cam 10.

Further, the cam 10 is eccentrically installed on the rotating shaft 11, a positioning clamping groove 14 is formed in the circumferential surface of the cam 10, the positioning clamping groove 14 corresponds to the protrusion 13, and the distance between the center of the rotating shaft 11 and the positioning clamping groove 14 is larger than the distance between the center of the rotating shaft 11 and the protrusion 13.

Further, the rotation shaft 11 penetrates the centers of the first gear 8 and the second gear 9. The mounting head 6 is provided with an elastic hook 15, and the bulge 13 and the telescopic sleeve 12 are integrally formed.

When the structure is used for controlling the extension and retraction of the refill, a human hand rotates the first gear 8 and the second gear 9, the first gear 8 and the second gear 9 drive the cam 13 to rotate through the rotating shaft 11, because one end of the refill rod 3, which is far away from the refill 4, is connected with the telescopic sleeve 12, one end of the telescopic sleeve 12, which is close to the cam 10, is provided with the bulge 13, the bulge 13 is in contact with the circumferential surface of the cam 10, the circumferential surface of the cam 10 is provided with the positioning clamping groove 14, the positioning clamping groove 14 corresponds to the bulge 13, the distance between the center of the rotating shaft 11 and the positioning clamping groove 14 is larger than the distance between the center of the rotating shaft 11 and the bulge 13, when the positioning clamping groove 14 of the cam 10 is inosculated with the bulge 13 at the end part of the telescopic sleeve 12, the cam 10 applies extrusion force to the telescopic sleeve 12, at the moment, the refill 4 extends out from the port of the end cap 2, after the cam 10 is continuously rotated, when the positioning clamping groove 14 is gradually far away from the bulge 13, the cam 10, the extrusion force to the telescopic sleeve 12 is gradually released, the telescopic sleeve 12 drives the refill head 4 to retract into the end cap 2 under the elastic action of the spring 5, the structure controls the extension and retraction of the refill head 4 through the continuity rotation of the cam 10, the refill head 4 is stably supported, the extension and retraction continuity is good, and the problem of extension and retraction blockage is avoided.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. A cam type automatic pen structure comprises a pen cap, an end cap which is arranged at the end part of the pen cap and is in threaded connection with the pen cap, a pencil core bar is arranged in the pencil sleeve, a pencil core head is arranged at the end part of the pencil core bar, the pencil core head is close to the end port of the end cap, the pencil holder bar is sleeved with a spring, one end of the spring is supported on a shoulder armor of the pencil holder bar, the other end of the spring is supported on a boss inside the pencil sleeve, it is characterized in that the top of the pen cap is provided with an adjusting mechanism for controlling the pen core rod to stretch, the adjusting mechanism comprises an installing head fixedly arranged at the top of the pen cap, the middle part of the installing head is provided with an opening, the opening is provided with a first gear and a second gear, a cam is arranged between the first gear and the second gear, the first gear, the second gear and the cam are fixedly connected through a rotating shaft, and two ends of the rotating shaft are rotatably connected with the mounting head;

the pen core rod is characterized in that one end, far away from the pen core head, of the pen core rod is connected with a telescopic sleeve, one end, close to the cam, of the telescopic sleeve is provided with a protrusion, and the protrusion is in contact with the circumferential surface of the cam.

2. The cam-type automatic pen structure according to claim 1, wherein said cam is eccentrically mounted on said shaft.

3. The cam-type automatic pen structure according to claim 1, wherein a positioning slot is provided on the circumferential surface of the cam, the positioning slot corresponds to the protrusion, and the distance between the center of the rotating shaft and the positioning slot is greater than the distance between the center of the rotating shaft and the protrusion.

4. The cam-type automatic pen structure according to claim 1, wherein the rotation shaft penetrates the centers of the first and second gears.

5. The cam-type automatic pen structure according to claim 1, wherein an elastic hook is mounted on the mounting head.

6. The cam-type automatic pen structure according to claim 1, wherein said projection is integrally formed with said telescoping sleeve.

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