Pen with connecting rod type telescopic locking mechanism

Abstract

The pen with the connecting rod type telescopic locking mechanism comprises a pen holder, a pen refill, a supporting seat, a first spring and the telescopic locking mechanism, an operating rod is arranged on the outer side of the rear end of the pen holder in a swinging mode, the supporting seat is arranged in the pen holder and can move in the front-back direction of the pen holder, and the rear end of the pen refill is matched with the supporting seat in an abutting mode. The first spring is arranged between the front end of the refill and the penholder in an abutting mode, the telescopic locking mechanism comprises a rotating body arranged in the penholder in a rotating mode, one end of the operating rod is arranged in the penholder in a penetrating mode and connected with the rotating body, and a limiting groove matched with the operating rod to limit the swing amplitude of the operating rod is formed in the rear end of the penholder. A connecting rod is arranged between the rotating body and the supporting base, one end of the connecting rod is rotationally connected to the position, deviating from the rotating axis, of the rotating body, and the other end of the connecting rod is rotationally connected with the rear end of the supporting base. The utility model has the advantages of compact structure, strong reliability and compact structure.

Description

Technical Field

[0001] The utility model relates to the technical field of writing tools, specifically to a writing tool with a connecting rod type telescopic locking mechanism. Background Art

[0002] Conventional pens with retractable refills, such as push-action pens, achieve retractable refill control via a retractable lock between a button at the rear end of the pen and the refill. Currently, some pens on the market utilize a cam mechanism to achieve retractable refill control. For example, a cam is positioned inside the pen barrel and an operating lever is positioned outside the barrel. The outer surface of the cam abuts against a support seat at the rear end of the refill. The operating lever drives the cam to rotate, which, in turn, drives the refill forward and backward along the pen barrel via the support seat, thereby achieving retractable refill control.

[0003] The above-mentioned pen using a cam mechanism is prone to wear between the cam and the support seat after long-term use, resulting in changes in the telescopic stroke of the pen core. The maximum extension of the pen core will continue to decrease, and it is also prone to jamming and poor operation. In addition, there is a correlation between the size of the cam and the telescopic stroke of the pen core. In order to ensure that the pen core has sufficient telescopic stroke, the cam is also required to have a sufficient size. In order to ensure that the pen barrel can accommodate the cam, its width is usually designed to be larger. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a writing instrument with a connecting rod type telescopic locking mechanism, which has a compact structure and high reliability.

[0005] The utility model provides a pen with a connecting rod type telescopic locking mechanism, comprising a pen barrel, a pen core, a support seat, a first spring, and a telescopic locking mechanism. An operating rod is swingably provided on the outer side of the rear end of the pen barrel. The support seat is provided in the pen barrel and can move along the front and rear directions of the pen barrel. The rear end of the pen core and the support seat form an abutment fit. The first spring is abutted between the front end of the pen core and the pen barrel, and can provide an elastic force for the pen core and the support seat to move backward. The telescopic locking mechanism comprises a rotating body rotatably provided in the pen barrel. One end of the operating rod is passed through the pen barrel. The pen holder is provided with a limit groove which cooperates with the operating lever to limit the swinging amplitude of the operating lever. A connecting rod is provided between the rotating body and the support seat. One end of the connecting rod is rotatably connected to the position of the rotating body which deviates from its rotation axis, and the other end of the connecting rod is rotatably connected to the rear end of the support seat. When the operating lever drives the rotating body to rotate, the supporting seat can be driven back and forth through the connecting rod, thereby driving the writing part at the front end of the pen core to extend or retract from the through hole at the front end of the pen holder.

[0006] Furthermore, a number of guide ribs are evenly distributed around the support seat, and a guide groove is provided on the inner side of the pen body, which cooperates with the guide ribs to form a guiding movement along the front and rear directions of the pen and a circumferential limit cooperation along the pen. The cooperation between the guide ribs and the guide grooves can prevent the support seat from rotating relative to the pen body, ensuring reliable transmission cooperation between the connecting rod, the support seat and the rotating body. It is not easy to get stuck or damaged during use, thereby improving reliability.

[0007] Furthermore, the front end of the support base has a sleeve portion, the inner side of the pen holder is provided with an annular flange, and a second spring is interposed between the support base and the pen holder. The rear end of the second spring is sleeved outside the sleeve portion, and the front end of the second spring is in abutment with the annular flange. The second spring can provide an elastic force for the support base to move backward, and by cooperating with the first spring, it can further enhance the propulsion effect on the support base.

[0008] Furthermore, the pen holder includes a main body portion and a rear end portion connected to the rear end of the main body portion. The main body portion and the rear end portion of the pen holder together constitute an inner cavity of the pen holder. The rotating body is rotatably connected to the rear end portion of the pen holder. The front end of the rear end portion of the pen holder is provided with a groove for the rotating body to be placed in. Vertical slide grooves are symmetrically provided on two opposite inner side walls of the groove of the rear end portion. The rear end end of the slide groove corresponding to the rear end of the pen is closed, and the front end end of the slide groove corresponding to the front end of the pen has an opening. Bosses that can be placed along the openings of the slide groove are symmetrically provided at the center positions of both sides of the rotating body. During installation, the rotating body is placed into the groove of the rear end portion of the pen holder along the opening. The boss of the rotating body can be placed into the rear end of the slide groove through the opening. The boss of the rotating body is held at the rear end of the slide groove by the pressure of the first spring / the second spring. The boss can rotate at the rear end of the slide groove. The structure is simple and convenient for installing the rotating body.

[0009] Furthermore, both sides of the opening at the front end of the slide groove are provided with guiding inclined surfaces, which facilitate the guiding and insertion of the boss into the slide groove.

[0010] Furthermore, a receiving groove for inserting one end of the connecting rod is provided on the outer peripheral surface of the rotating body, and one end of the connecting rod is inserted into the receiving groove and rotatably connected to the side wall of the receiving groove. The rear end of the support seat is integrally provided with a connecting block rotatably connected to the other end of the connecting rod, thereby improving the force effect of the rotating body and the connecting rod and making the structure more compact.

[0011] As one of the preferred solutions, the connecting rod is formed by bending metal wire, and the connecting rod includes a vertical rod, a horizontal rod connected to both ends of the vertical rod and perpendicular to the vertical rod, and the horizontal rod connected to both ends of the vertical rod serves as a rotating shaft to form a pivot connection with the rotating body and the connecting block respectively.

[0012] As another preferred solution, the connecting rod is integrally formed from a plastic material, and connecting columns are symmetrically provided on both sides of one end of the connecting rod, and the connecting columns and the rotating body form a rotating plug-in fit. The other end of the connecting rod includes two support arms arranged at intervals and a connecting shaft connected between the two support arms. The connecting block includes a C-shaped connecting hole, and the connecting shaft and the connecting hole form a rotating connection fit. The connecting shaft can be inserted into the connecting hole through the opening of the C-shaped connecting hole for installation.

[0013] The beneficial effects of the present invention are as follows: compared with the retractable refill pen in the prior art which adopts a rotating body driving method, the pen of the present invention is provided with a connecting rod between the rotating body and the refill, which can increase the stroke of the retractable movement of the refill and reduce the requirements for the size of the rotating body; the transmission structure is more reliable and not prone to jamming, which can extend the service life of the pen. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of Example 1 of the present utility model;

[0015] Figure 2 This is an exploded view of Example 1 of the present utility model;

[0016] Figure 3 This is a side view of the telescopic locking mechanism of Example 1 of the present utility model;

[0017] Figure 4 A cross-sectional view of the rear end portion of the pen holder according to Example 1 of the present utility model;

[0018] Figure 5 This is a partial cross-sectional view of the refill in the retracted state of Example 1 of the present invention;

[0019] Figure 6 A partial cross-sectional view of the pen core of Example 1 of the present utility model when it is in an extended state;

[0020] Figure 7 This is a structural diagram of the connecting rod obtained in Example 1 of the utility model;

[0021] Figure 8 This is an exploded view of the telescopic locking mechanism of Example 2 of the present utility model;

[0022] Figure 9 A partial cross-sectional view of Example 2 of the present utility model when the pen core is in a retracted state;

[0023] Figure 10 A partial cross-sectional view of Example 2 of the present utility model when the pen core is in an extended state;

[0024] Figure 11 This is a structural diagram of the connecting rod of Example 2 of the present utility model. DETAILED DESCRIPTION

[0025] The writing instrument with the connecting rod type telescopic locking mechanism of embodiment 1 of the present invention is as follows Figure 1-7 As shown, it includes a pen barrel (11, 12), a pen core 2, a support seat 3, a first spring 41, and a telescopic locking mechanism. An operating rod 5 is swingably arranged on the outer side of the rear end of the pen barrel (11, 12). The support seat 3 is arranged in the pen barrel (11, 12) and can move along the front and rear directions of the pen barrel (11, 12). The rear end of the pen core 2 and the support seat 3 form an abutment fit. The first spring 41 is abutted between the front end of the pen core 2 and the pen barrel (11, 12) and can provide an elastic force for the pen core 2 and the support seat 3 to move backward. The telescopic locking mechanism includes a rotating body 6 rotatably arranged in the pen barrel (11, 12). One end of the operating rod 5 is passed through the pen barrel (11, 12) and is connected to the rotating body 6. The operating rod 5 includes The rotating body 6 is integrally connected to the rod body, and the spherical body is fixedly plugged into the rod body. The rod body of the operating rod 5 is inserted between the inner and outer sides of the pen body. When the operating rod 5 is swung, the rotating body 6 can also be driven to rotate. The rear end of the pen body (11, 12) is provided with a limit groove 121 that cooperates with the operating rod 5 to limit the swing amplitude of the operating rod 5. A connecting rod 7 is provided between the rotating body 6 and the support seat 3. One end of the connecting rod 7 is rotatably connected to a position of the rotating body 6 that deviates from its rotation axis. The other end of the connecting rod 7 is rotatably connected to the rear end of the support seat 3. When the operating rod 5 drives the rotating body 6 to rotate, the supporting seat 3 can be driven to move forward and backward through the connecting rod 7, thereby driving the front end writing part of the pen core 2 to extend or retract from the through hole at the front end of the pen body (11, 12).

[0026] When the pen core is in the extended state by the operating rod 5, Figure 6 As shown, the connecting rod 7 is in an inclined state. Whether it is the backward thrust applied by the pen core 2 to the support base 3 during writing or the backward thrust applied by the first spring 41 to the support base 3, the connecting rod 7 can drive the rotating body 6 to rotate in the direction of the core (corresponding to the direction of the core). Figure 6 The rotating body 6 is rotated in the clockwise direction), based on the limiting fit between one end of the limiting groove 121 and the operating rod 5, the rotating body 6 is prohibited from rotating in the direction of the core being ejected, so that the pen core can always be kept in the core-out state; when the pen core needs to be retracted, as shown in FIG. Figure 5 As shown, the operating rod 5 drives the rotating body 6 to rotate in the direction of core shrinkage (corresponding to Figure 5 When the connecting rod 7 is rotated to the state of tilting in the other direction, the first spring 41 exerts a backward thrust on the support base 3, which can further cause the rotating body 6 to rotate in the direction of shrinking the core. Based on the limiting cooperation between the other end of the limiting groove 121 and the operating rod 5, the pen core is kept in the state of shrinking the core.

[0027] A plurality of guide ribs 31 are evenly distributed around the support seat 3, and a guide groove is provided on the inner side of the pen body (11, 12) to form a guiding movement cooperation along the front-back direction of the pen and to form a circumferential limit cooperation along the pen. The two ends of the guide groove are arranged corresponding to the front-back direction of the pen. The cooperation between the guide ribs 31 and the guide groove can prevent the support seat 3 from rotating relative to the pen body (11, 12), thereby ensuring reliable transmission cooperation between the connecting rod 7, the support seat 3 and the rotating body 6. It is not easy to get stuck or damaged during use, thereby improving reliability.

[0028] The front end of the support seat 3 has a sleeve portion 32, and the inner side of the pen holder (11, 12) is provided with an annular flange 13. A second spring 42 is provided between the support seat 3 and the pen holder (11, 12). The rear end of the second spring 42 is sleeved on the outer side of the sleeve portion 32, and the front end of the second spring 42 is in abutment with the annular flange 13. The second spring 42 can provide an elastic force for the support seat 3 to move backward, and can further enhance the pushing effect of the support seat 3 by cooperating with the first spring 41.

[0029] The pen holder (11, 12) includes a main body portion 11 and a rear end portion 12 connected to the rear end of the main body portion 11. The main body portion 11 and the rear end portion 12 of the pen holder (11, 12) together constitute an inner cavity of the pen holder (11, 12). The rotating body 6 is rotatably connected to the rear end portion 12 of the pen holder (11, 12). The front end of the rear end portion 12 of the pen holder (11, 12) is provided with a groove 122 for the rotating body 6 to be placed therein. Vertical slide grooves 123 are symmetrically provided on two oppositely arranged inner side walls of the groove 122 of the rear end portion 12. The rear end end of the slide groove 123 corresponding to the rear end of the pen is closed, and the front end end of the slide groove 123 corresponding to the front end of the pen has an opening. The center positions on both sides of the rotating body 6 are symmetrically provided with protrusions 61 that can be placed along the opening of the slide groove 123. During installation, the rotating body 6 is placed along the opening into the groove 122 of the rear end portion 12 of the pen holder (11, 12), and the boss 61 of the rotating body 6 can be placed into the rear end of the slide groove 123 through the opening. The boss 61 of the rotating body 6 is indirectly maintained at the rear end of the slide groove 123 by the pressure of the first spring 41 and the second spring 42. The boss 61 can rotate at the rear end of the slide groove 123. The structure is simple and the installation of the rotating body 6 is convenient.

[0030] Both sides of the opening at the front end of the slide groove 123 are provided with guiding inclined surfaces, which facilitate guiding the boss 61 to be inserted into the slide groove 123 .

[0031] A receiving groove 62 for inserting one end of the connecting rod 7 is provided on the outer peripheral surface of the rotating body 6. One end of the connecting rod 7 is inserted into the receiving groove 62 and is rotatably connected to the side wall of the receiving groove 62. The rear end of the support seat 3 is integrally provided with a connecting block 33 rotatably connected to the other end of the connecting rod 7, thereby improving the force effect of the rotating body 6 and the connecting rod 7 and making the structure more compact.

[0032] In this embodiment, if Figure 7 As shown, the connecting rod 7 is formed by bending a metal wire, and the connecting rod 7 includes a vertical rod 71 and a horizontal rod 72 connected to both ends of the vertical rod 71 and perpendicular to the vertical rod 71. The horizontal rod 72 connected to both ends of the vertical rod 71 serves as a rotating shaft to form a pivot connection with the rotating body 6 and the connecting block 33 respectively.

[0033] The writing instrument with the connecting rod 7-type telescopic locking mechanism of embodiment 2 of the present invention is as follows Figure 8-11 As shown, the difference from embodiment 1 lies in the difference in the connecting rod 7 and its connection structure, as shown in FIG. Figure 11 As shown: the connecting rod 7 is integrally formed from a plastic material, and connecting columns 73 are symmetrically provided on both sides of one end of the connecting rod 7. The connecting columns 73 and the rotating body 6 form a rotating plug-in fit. The other end of the connecting rod 7 includes two support arms 74 arranged at intervals and a connecting shaft 75 connected between the two support arms 74. The connecting block 33 includes a C-shaped connecting hole, and the connecting shaft 75 forms a rotating connection fit with the connecting hole. The connecting shaft can be inserted into the connecting hole through the opening of the C-shaped connecting hole for installation.

[0034] The above embodiment is only one preferred embodiment of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A pen with a linkage-type telescopic locking mechanism, comprising a pen holder, a pen refill, a support seat, a first spring, and a telescopic locking mechanism; an operating lever is swingably provided on the outer rear end of the pen holder; the support seat is disposed within the pen holder and is movable in the front-to-back direction of the pen holder; the rear end of the pen refill and the support seat form an abutment fit; the first spring is abutted between the front end of the pen refill and the pen holder; and the pen holder is characterized in that: The telescopic locking mechanism includes a rotating body rotatably arranged in the pen barrel, one end of the operating rod is passed through the pen barrel and connected to the rotating body, the rear end of the pen barrel is provided with a limit groove cooperating with the operating rod to limit the swing amplitude of the operating rod, a connecting rod is provided between the rotating body and the support seat, one end of the connecting rod is rotatably connected to a position of the rotating body deviating from its rotation axis, and the other end of the connecting rod is rotatably connected to the rear end of the support seat.

2. The writing instrument with a connecting rod type telescopic locking mechanism according to claim 1, characterized in that: A plurality of guide ribs are evenly distributed around the support seat, and a guide groove is provided on the inner side of the pen body to cooperate with the guide ribs for guiding movement along the front and rear directions of the pen and to cooperate with the circumferential limit of the pen.

3. The writing instrument with a connecting rod type telescopic locking mechanism according to claim 1, characterized in that: The front end of the support seat has a socket portion, and an annular flange is provided on the inner side of the pen body. A second spring is arranged between the support seat and the pen body, and the rear end of the second spring is sleeved on the outer side of the socket portion. The front end of the second spring is in abutment with the annular flange.

4. The writing instrument with a connecting rod type telescopic locking mechanism according to claim 1, characterized in that: The pen holder includes a main body part and a rear end part connected to the rear end of the main body part. The main body part and the rear end part of the pen holder together constitute the inner cavity of the pen holder. The rotating body is rotatably connected to the rear end part of the pen holder. The front end of the rear end part of the pen holder is provided with a groove for the rotating body to be placed in. Vertical sliding grooves are symmetrically arranged on the two opposite inner side walls of the groove of the rear end part. The rear end end of the sliding groove corresponding to the rear end of the pen is closed, and the front end end of the sliding groove corresponding to the front end of the pen has an opening. The center positions on both sides of the rotating body are symmetrically provided with protrusions that can be placed along the opening of the sliding groove.

5. The writing instrument with a connecting rod type telescopic locking mechanism according to claim 4, characterized in that: Both sides of the opening of the front end portion of the slide groove are provided with guiding inclined surfaces.

6. The writing instrument with a connecting rod type telescopic locking mechanism according to claim 1, characterized in that: A receiving groove for inserting one end of the connecting rod is provided on the outer circumferential surface of the rotating body. One end of the connecting rod is inserted into the receiving groove and rotatably connected to the side wall of the receiving groove. The rear end of the support seat is integrally provided with a connecting block rotatably connected to the other end of the connecting rod.

7. The writing instrument with a connecting rod type telescopic locking mechanism according to claim 6, characterized in that: The connecting rod is formed by bending a metal wire and includes a vertical rod and a horizontal rod connected to both ends of the vertical rod and perpendicular to the vertical rod. The horizontal rods connected to both ends of the vertical rod serve as rotating shafts to form pivotal connections with the rotating body and the connecting block respectively.

8. The writing instrument with a connecting rod type telescopic locking mechanism according to claim 6, characterized in that: The connecting rod is integrally formed from a plastic material, and connecting columns are symmetrically arranged on both sides of one end of the connecting rod. The connecting columns and the rotating body form a rotating plug-in fit. The other end of the connecting rod includes two support arms arranged at intervals and a connecting shaft connected between the two support arms. The connecting block includes a C-shaped connecting hole, and the connecting shaft and the connecting hole form a rotating connection fit.

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