Pen with propulsive refill

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] Referring to Figures 5 to 8, the retractable pen 2 of the present invention is similar in appearance to the general push-type pen 1, but the known general push-type pen 1 can only press the button to control the expansion and contraction of the refill, while the present invention In addition to pressing the button to control the expansion and contraction of the pen core, the push-type pen 2 can also be swung forward to control the expansion and contraction of the pen core. This embodiment specifically includes an outer pen tube 20, a button 30, an inner sleeve 40, and The inner pen core 50 and the return spring 60 of the casing 40, the outer pen tube 20 is screwed to a front tube 23, and the outer pen tube 20 is provided with a central hole 22, and the inside of the tail end of the outer pen tube 20 is provided with several rings arranged around the periphery The guide rail 21, the central hole 22 passes through the center of the guide rail 21.

[0021] The button 30 is a tubular body, and the center of the tube is provided with a hollow tube 31 extending forward. The hollow tube 31 is inserted from the front end of the outer pen tube 20 and passed through the central hole 22 to be screwed together with the button 30. The outer edge of the front end of the empty tube 31 is provided with a first annular ratchet 32 ​​with a slightly larger diameter than the hollow tube 31, and the inner wall of the first annular ratchet 32 ​​faces the hollow tube 31 to form a smaller circular ratchet. flange 33 .

[0022] A first stop ring 41 and a second stop ring 42 are also provided on the outer ring surface of the front end and the rear end of the inner sleeve 40, and a ring that can slide back and forth on the outer wall of the inner sleeve 40 is provided between the two stop rings. The load ring 43, the first stop ring 41 is screwed to the front end of the inner sleeve 40, the second stop ring 42 is screwed to the rear end of the inner sleeve 40 or directly formed on the rear end of the inner sleeve 40 On, the rear end surface of the inner sleeve 40 is provided with a shaft 44 extending backward, and the outer edge of the shaft 44 is provided with a second annular ratchet 45 that cooperates with the first annular ratchet 32 ​​at the front end of the hollow tube 31, and the shaft The rod 44 passes through the flange 33 on the inner surface of the front end of the hollow tube 31 and is screwed together with the collar 46, so that the shaft rod 44 and the collar 46 can slide back and forth in the hollow tube 31 without slipping from it. The front end of the hollow tube 31 is disengaged. In other words, when the shaft rod 44 moves forward together with the inner sleeve 40, the collar 46 will stop on the flange 33 of the hollow tube 31 first, and then force the hollow tube 31 together with the inner sleeve 40 to move forward. The button 30 moves forward synchronously, and the return spring 60 is sleeved on the front end of the pen core 50, and is between the concave edge 51 of the front end of the pen core 50 and the inner surface of the front section tube 23 of the outer pen tube 20, so that the pen core 50 and the inner sleeve can be provided. The tube 40 is resilient to the rear.

[0023] Wherein, the second annular ratchet and the shaft are integrally formed or assembled separately, and the stop ring is made of iron or copper.

[0024] When the push-type pen 2 (outer pen tube 20 and front tube 23) of the embodiment is assembled, the return spring 6-presses forward against the inner surface of the front tube 23, and thus elastically presses against the pen core 50 relatively backward, Make the pen core 50 together with the inner sleeve 40 and the second ring ratchet 45 elastically press back against the first ring ratchet 32 ​​at any time, thereby providing the elastic force required by the button 30 during the cyclic pressing operation.

[0025] When this embodiment is used, its cyclic pressing operation process is the same as that of the existing general pressing pen 1, that is, two pairs of annular ratchets 32, 45 cooperate between the button 30 and the inner sleeve to achieve the telescopic purpose of the pen core. . Simultaneously this embodiment swings forward and can reach the retractable purpose of pen core equally, no matter whether pen core 50 is in retracted state at this moment. Before swinging, the rear end button 30 can be made downward so that the load ring 43 naturally slides onto the second stop ring 42, and after swinging, the load ring 43 is quickly slid forward by the second stop ring 42. Hit the first stop ring 41 of the inner sleeve 40, and at the same time, the load ring 43 generates enough momentum to drive the inner sleeve 40, the pen core 50, the hollow tube 31 and the button 30 to slide forward synchronously, so that each time the pen is shaken The resulting action is equal to the action of pressing the button 30 every time, and the core end 52 of the pen core 50 can be stretched and retracted at the head end 24 of the front end of the outer pen tube 20 .