A pen holder restraining device and a new plotter gun

Abstract

The present application relates to a new type of spray gun. The pen holder restraining device comprises a restraining rubber sleeve and a pen inserting sleeve, and has the effect of self-adapting deformation, so that the pen inserting cavity can be self-adapted to the shape of the pen holder and play the effect of clamping and restraining the pen holder. The annular sealing sheet on the pen holder restraining device can also be sealingly fitted with the pen holder, so that the insertion part of the pen holder and the pen holder restraining device is sealingly and airtightly arranged. The new type of spray gun is provided with a pen holder restraining device, which can ensure the insertion of the pen holder while not affecting the air tightness of the air cavity, and can also be adapted to pen holders of various shapes and sizes, greatly improving the universality and general applicability of the present application and improving the use experience of consumers.

Description

Technical Field

[0001] This invention relates to an inkjet printer, and more particularly to a novel inkjet printer. Background Technology

[0002] An airbrush (or inkjet printer) is a device that uses a high-speed airflow to create negative pressure, drawing in liquid ink and atomizing it before spraying it out. There are many types of airbrushes on the market, with a wider variety designed for children and students. These airbrushes are typically compact and aesthetically pleasing, and often include a built-in miniature air pump as the air source for the high-speed airflow. They also come with ink cans for storing the ink. However, the inclusion of an ink can makes these airbrushes less compact, and there is a risk of leakage, potentially causing contamination.

[0003] As a result, new types of inkjet guns using markers as the ink source have begun to appear on the market. The specific structure can be found in the following patent: Micro-pump Graffiti Airgun (Publication No.: CN206046314U). Its structure eliminates the ink tank found in existing inkjet gun designs, adding a connector for attaching the pen barrel. It utilizes negative pressure generated by a high-speed airflow to draw in the pen tip. The pen tip contains dense conduits that draw out the liquid ink from inside the pen barrel and eject it with the high-speed airflow, creating an inkjet effect. These inkjet guns have a more compact and simpler structure and do not require liquid ink.

[0004] However, existing marker pen barrels come in a variety of shapes, commonly including cylindrical, triangular prism, and square prism. The connectors on existing inkjet printers are generally not versatile, only compatible with fixed pen barrel shapes, thus limiting their versatility. To address this, some inkjet printer manufacturers have produced inkjet printers with interchangeable connectors, allowing users to change the connector according to the specific shape of the marker. However, this not only increases production costs but also adds to the operational steps, and the replacement connectors are easily lost. Summary of the Invention

[0005] This invention provides a novel inkjet printer, solving the problem of poor versatility of the pen insertion part on inkjet printers in the prior art.

[0006] The above-mentioned technical problems of the present invention are mainly solved by the following technical solution: a novel inkjet gun, including an inkjet gun housing and an air jet assembly disposed on the inkjet gun housing, the air jet assembly including an air chamber, an air supply pipe communicating with the air chamber and an air jet port located at the front end of the air chamber, characterized in that: it further includes a pen barrel restraint device, which includes a restraint rubber sleeve and a pen insert sleeve; The pen insert sleeve includes an annular positioning sleeve and a plurality of deformable rods disposed thereon. All deformable rods are distributed around the axis of the annular positioning sleeve. The root of the deformable rod is fixed to the annular positioning sleeve. The main body of the deformable rod extends along the axis of the annular positioning sleeve and gradually moves toward the axis. The annular positioning sleeve and all deformable rods together define the pen insert cavity. The diameter of the pen insert cavity is smaller the closer it is to the outer end of the deformable rod. The constraint sleeve includes a substrate and a constraint portion thereon, the constraint portion defining a constraint through hole, the front ends of all deformation rods extending into the constraint through hole and fitting against the hole wall; The penholder constraint device is located at the rear end of the air chamber, and the outer periphery of the substrate is provided with a connecting piece that is airtightly connected to the air chamber. The annular positioning sleeve is fixedly connected to the spray gun housing.

[0007] The printing principle of this new inkjet printer is as follows: A marker is inserted into the pen-binding device and extended into the air chamber, ensuring the pen tip is within the airflow area of ​​the nozzle. Then, the air supply pipe is connected to the air source, supplying air to the air chamber. The high-speed airflow is ejected from the nozzle, creating the printing effect. For good printing results, the air chamber must be well-sealed, allowing airflow only from the nozzle. The pen-binding device provides good sealing, meeting the requirements of this new inkjet printer.

[0008] Through the above-described technical solution, this invention enables the pen-binding device disclosed herein to be compatible with various models of marker pens. The specific usage is as follows: After removing the marker cap, place the marker tip with the larger diameter side of the pen insertion cavity facing it, and slowly insert it. During insertion, the pen tip will contact the deformation rods on the outside of the insertion cavity. Due to the elasticity of all the deformation rods themselves and the elastic constraint of the constraint portion on the constraint sleeve, they tend to maintain their original distribution shape. Therefore, all the deformation rods will tightly adhere to the outer sidewall of the pen barrel. The more deformation rods there are and the denser their distribution, the better the adhesion effect. Moreover, the larger the contact area between each deformation rod and the pen barrel, the better the constraint effect on the pen barrel. Therefore, a segment almost parallel to the axis of the annular positioning sleeve can be set on the deformation rod. This increases the contact length with the pen barrel while it is in contact with it, improving the axial positioning constraint effect on the pen barrel.

[0009] Furthermore, an annular sealing plate is provided on the constraint sleeve and at the front end of the deformation rod. The annular sealing plate has a pen insertion hole coaxial with the axis of the annular positioning sleeve, and the diameter of the pen insertion hole is smaller than the minimum diameter of the pen insertion cavity. Through the above technical solution, this invention allows the marker pen to pass through the pen insertion hole simultaneously when inserted. Because the diameter of the pen insertion hole is smaller than the pen pen, it can completely seal against the side wall of the pen pen, and further constrain the pen pen, fixing it to the axis of the annular positioning sleeve.

[0010] Furthermore, the constraint part is a hollow tube structure. The annular sealing plate is located at the front end of the constraint part, and the rear end of the constraint part has a limiting ring protruding towards the constraint through hole. The front end of the deformation rod has a limiting part, and the front and rear ends of the limiting part respectively engage with the annular sealing plate and the limiting ring. Through the above technical solution, the front end of the deformation rod can fit better with the constraint part, and an axial limiting is formed between the front end of the deformation rod and the constraint part. In this way, the deformation rod is not easy to fall off from the constraint part during the insertion and removal of the pen barrel. Furthermore, the spray gun housing is provided with an air chamber housing and a locking ring. The air jet is located at the front end of the air chamber housing, and the locking ring is sleeved on the rear end of the air chamber housing. The connecting piece is airtightly clamped between the locking ring and the air chamber housing. The front end of the air chamber housing is also provided with a pen tip limiting part, which allows the pen tip to pass through, but will abut against the front end of the pen barrel to limit the extension length of the pen barrel.

[0011] Furthermore, the front end of the air chamber housing is provided with a columnar screw-on portion, on which an adjusting cap is airtightly screwed. The adjusting cap covers the pen tip limiting portion and the air jet nozzle. The adjusting cap is provided with a sealing cap directly opposite the pen tip limiting portion. The sealing cap is made of elastic rubber material and has a through hole. Through the above technical solution, when the pen barrel is inserted, the relative position of the sealing cap and the pen tip is adjusted by rotating the adjusting cap, so that the pen tip protrudes from the small hole on the sealing cap. The sealing cap plays a sealing role, so the air chamber is completely sealed in this state. When the air supply pipe starts to supply air, the air pressure in the air chamber increases sharply, and the sealing cap will deform first, causing the diameter of the small hole to expand. In this way, an annular air outlet is formed between the small hole and the pen tip. The high-speed airflow flows around the pen tip in an annular pattern, resulting in a better printing effect. Furthermore, since the length of the pen tip extending out varies depending on the size of the marker pen after contact with the pen tip stop, and the sealing cap is elastic, even if the pen tip is slightly too long, it will not affect the use. There is no need to rotate the adjusting cap too frequently to adjust the relative position between the sealing cap and the pen tip.

[0012] Therefore, compared with the prior art, the present invention has the following characteristics: 1. The pen barrel constraint device has an adaptive deformation effect, so that its pen insertion cavity can adaptively fit the shape of the pen barrel, thereby clamping and constraining the pen barrel. The annular sealing plate on it can also seal and fit with the pen barrel, making the insertion part of the pen barrel and the pen barrel constraint device a sealed and airtight design; 2. The new inkjet gun is equipped with a pen barrel constraint device, which ensures that the airtightness of the air chamber is not affected while inserting the pen barrel. It can also be adapted to pen barrels of various shapes and sizes, greatly improving the versatility and applicability of the present invention and enhancing the user experience; 3. During the inkjet printing process, the sealing cap will adaptively deform, causing the aperture of the small hole to expand. An annular air outlet is formed between the small hole and the pen tip. The high-speed airflow flows around the pen tip in an annular shape, resulting in a better inkjet printing effect; 4. Different specifications of marker pens have different pen tip extension lengths after contacting the pen tip limiting part. However, the sealing cap is elastic, so even if the pen tip is slightly too long, it will not affect the use. It is more convenient to use because it is not necessary to rotate the adjusting cap too frequently to adjust the relative position of the sealing cap and the pen tip. Attached Figure Description

[0013] Appendix Figure 1 This is a schematic diagram of a pen barrel constraint device; Appendix Figure 2 This is a schematic diagram of the disassembled pen barrel constraint device; Appendix Figure 3 This is a partial exploded view of the new type of inkjet printer; Appendix Figure 4 It is an assembly drawing of the pen barrel constraint device and the spray gun housing; Appendix Figure 5 It is an assembly drawing of the pen barrel constraint device and the air chamber shell; Appendix Figure 6 It is attached Figure 5 Enlarged view of part A; Appendix Figure 7 This is a schematic diagram of the jet nozzle. Detailed Implementation

[0014] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0015] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0016] Example: See Figure 3 , Figure 4 and Figure 5 A novel inkjet printer includes an inkjet gun housing 300 and an air jet assembly disposed on the inkjet gun housing. The air jet assembly includes an air chamber 410, an air supply pipe 420 communicating with the air chamber, and an air jet nozzle 430 located at the front end of the air chamber (see [reference]). Figure 7 It also includes a pen barrel restraint device, see Figure 1 and Figure 2 The pen barrel restraint device 10 includes a restraint rubber sleeve 100 and a plastic pen insert sleeve 200; The pen insert sleeve includes an annular positioning sleeve 210 and deformation rods 220 disposed thereon. The number of deformation rods is between 16 and 24. All deformation rods are distributed around the axis of the annular positioning sleeve. The root of the deformation rod is fixed to the annular positioning sleeve. The main body of the deformation rod extends along the axis of the annular positioning sleeve and gradually moves towards the axis. The annular positioning sleeve and all deformation rods together define the pen insert cavity 20. The closer to the outer end of the deformation rod in the pen insert cavity, the smaller the diameter of the hole. The diameter of the hole on the large opening side of the pen insert cavity is between 20 and 30 mm, and the diameter of the hole on the small opening side of the pen insert cavity is between 7 and 12 mm. The constraint sleeve includes a substrate 110 and a constraint portion 120 disposed thereon. The constraint portion defines a constraint through hole 130, and the front ends of all deformation rods extend into the constraint through hole and fit against the hole wall.

[0017] The pen-barrel restraint device is located at the rear end of the air chamber. A connecting piece 170, which is airtightly connected to the air chamber, is provided around the periphery of the substrate. The connecting piece is tubular. An annular positioning sleeve is fixedly connected to the spray gun housing. The spray gun housing has an insertion port 301 directly opposite the annular positioning sleeve. Because the aforementioned pen-barrel restraint device has the aforementioned technical effects, the new type of inkjet gun with this pen-barrel restraint device also has the same technical effects. The inkjet printing principle of this new inkjet gun is as follows: a marker is inserted into the pen-barrel restraint device and extends into the air chamber, so that the pen tip is within the air jet area of ​​the air jet nozzle. Then, after the air supply pipe is connected to the air source, air is supplied to the air chamber, and a high-speed airflow is ejected from the air jet nozzle, forming the inkjet printing effect. To achieve a good inkjet printing effect, the air chamber needs to be airtight, and the airflow can only be ejected from the air jet nozzle. The pen-barrel restraint device has good airtightness, which meets the requirements of this new type of inkjet gun.

[0018] This embodiment, through the above technical solution, enables the pen barrel constraint device disclosed in this embodiment to be compatible with various models of marker pens. The specific usage is as follows: After removing the marker pen cap, place the pen tip facing the larger diameter side of the pen insertion cavity and slowly insert it. During insertion, the pen tip will contact the deformation rods on the outside of the pen insertion cavity. Due to the elasticity of all the deformation rods themselves and the elastic constraint of the constraint part on the constraint sleeve, they tend to maintain their original distribution shape. Therefore, all the deformation rods will tightly adhere to the outer sidewall of the pen barrel. The more deformation rods there are and the denser their distribution, the better the adhesion effect. Moreover, the larger the contact area between each deformation rod and the pen barrel, the better the constraint effect on the pen barrel. Therefore, a segment almost parallel to the axis of the annular positioning sleeve can be set on the deformation rod. This increases the contact length with the pen barrel when in contact with it, improving the axial positioning constraint effect on the pen barrel.

[0019] See Figure 1 and Figure 2 An annular sealing plate 140 is provided on the constraint sleeve and at the front end of the deformation rod. The annular sealing plate has a pen insertion hole 150 coaxial with the axis of the annular positioning sleeve. The diameter of the pen insertion hole is smaller than the minimum diameter of the pen insertion cavity. This embodiment, through the above technical solution, allows the marker pen to pass through the pen insertion hole simultaneously when inserted. Because the diameter of the pen insertion hole is smaller than the pen pen, it can completely seal against the side wall of the pen pen, and further constrain the pen pen, fixing it to the axis of the annular positioning sleeve.

[0020] See Figure 1 and Figure 2 The constraint part is a hollow tube structure. An annular sealing plate is located at the front end of the constraint part, and a limiting protrusion 160 protruding towards the constraint through hole is located at the rear end of the constraint part. A limiting part 221 is located at the front end of the deformation rod. The front and rear ends of the limiting part are respectively limited to the annular sealing plate and the limiting protrusion. Through the above technical solution, the front end of the deformation rod can fit better with the constraint part, and an axial limit is formed between the front end of the deformation rod and the constraint part. In this way, the deformation rod is not easy to fall off the constraint part during the insertion and removal of the pen barrel.

[0021] See Figure 4 and Figure 5 The spray gun housing has an air chamber housing 310 and a locking ring 320. The air outlet is located at the front end of the air chamber housing, and the locking ring is sleeved at the rear end of the air chamber housing. The connecting piece is airtightly clamped between the locking ring and the air chamber housing, and the locking ring is engaged and fixed to the spray gun housing. The outer wall of the annular positioning sleeve has a protruding outer limiting ring 211, and the spray gun housing has a positioning part 330 that is fixedly engaged with the outer limiting ring. The front end of the air chamber housing also has a pen tip limiting part 311 (see...). Figure 7 The pen tip limiting part allows the pen tip to pass through, but it will abut against the front end of the pen barrel to limit the extension length of the pen barrel.

[0022] See Figure 5 and Figure 6 The front end of the air chamber shell is provided with a columnar screw-on part 312, on which an adjusting cap 340 is airtightly screwed. The adjusting cap covers the pen tip limiting part and the air jet nozzle. The adjusting cap is provided with a sealing cap 350 opposite to the pen tip limiting part. The sealing cap is made of elastic rubber material and has a through hole 351. Through the above technical solution, in this embodiment, when the pen barrel is inserted, the relative position of the sealing cap and the pen tip is adjusted by rotating the adjusting cap, so that the pen tip protrudes from the small hole on the sealing cap. The sealing cap will play a sealing role. Therefore, the air chamber is completely sealed in this state. When the air supply pipe starts to supply air, the air pressure in the air chamber increases sharply. The sealing cap will deform first, causing the diameter of the small hole to expand. In this way, an annular air outlet is formed between the small hole and the pen tip. The high-speed airflow flows around the pen tip in an annular shape, resulting in a better printing effect. Furthermore, since the length of the pen tip extending out varies depending on the size of the marker pen after contact with the pen tip stop, and the sealing cap is elastic, even if the pen tip is slightly too long, it will not affect the use. There is no need to rotate the adjusting cap too frequently to adjust the relative position between the sealing cap and the pen tip.

[0023] See Figure 6 The front end of the screw joint is provided with an annular positioning groove 313, and a sealing ring 360 is provided in the positioning groove to airtightly fit with the adjusting cap, so as to improve the airtightness between the screw joint and the adjusting cap.

[0024] See Figure 6 An elastic rubber gasket 370 is also filled between the sealing cap and the front end of the air chamber shell. The gasket can firmly abut the sealing cap against the adjusting cap, improving the overall airtightness.

[0025] See Figure 3 The jet assembly also includes a miniature air pump 440 located inside the spray gun housing. The spray gun housing is also equipped with a power supply 380, a push-button switch 390, and a power indicator light, making it more convenient to use.

[0026] It will be apparent to those skilled in the art that the present invention can be modified in various ways, and such modifications are not considered to depart from the scope of the invention. All such modifications that are obvious to those skilled in the art are included within the scope of the claims.

Claims

1. A novel inkjet printer, comprising an inkjet printer housing and an air jet assembly disposed on the inkjet printer housing, the air jet assembly comprising an air chamber, an air supply pipe communicating with the air chamber, and an air jet nozzle located at the front end of the air chamber, characterized in that: It also includes a pen barrel restraint device, which comprises a restraining rubber sleeve and a pen insert sleeve; the pen insert sleeve includes an annular positioning sleeve and a plurality of deformation rods disposed thereon, all of which are distributed around the axis of the annular positioning sleeve, with the root of each deformation rod fixed to the annular positioning sleeve, and the main body of each deformation rod extending along the axis of the annular positioning sleeve and gradually converging towards the axis. The annular positioning sleeve and all the deformation rods together define the pen insert cavity, and the diameter of the pen insert cavity decreases as it approaches the outer end of each deformation rod; the restraining rubber sleeve... The sleeve includes a base plate and a constraint portion thereon, the constraint portion defining a constraint through hole, the front ends of all deformation rods extending into the constraint through hole and fitting against the hole wall; an annular sealing plate is provided on the constraint sleeve and at the front end of the deformation rod, the annular sealing plate has a pen insertion hole coaxial with the axis of the annular positioning sleeve, the diameter of the pen insertion hole is smaller than the minimum diameter of the pen insertion cavity; the pen restraint device is provided at the rear end of the air cavity, the outer periphery of the base plate has a connecting piece that is airtightly connected to the air cavity, and the annular positioning sleeve is fixedly connected to the spray gun housing.

2. The novel inkjet printer according to claim 1, characterized in that: The constraint part is a hollow tube structure. The annular sealing sheet is located at the front end of the constraint part. The rear end of the constraint part is provided with a limiting protrusion ring protruding towards the constraint through hole. The front end of the deformation rod is provided with a limiting part. The front and rear ends of the limiting part are respectively in limiting cooperation with the annular sealing sheet and the limiting protrusion ring.

3. The novel inkjet printer according to claim 1, characterized in that: The spray gun housing is provided with an air chamber housing and a locking ring. The air jet is located at the front end of the air chamber housing, and the locking ring is sleeved on the rear end of the air chamber housing. The connecting piece is airtightly clamped between the locking ring and the air chamber housing. The front end of the air chamber housing is also provided with a pen tip limiting part.

4. The novel inkjet printer according to claim 3, characterized in that: The front end of the air chamber housing is provided with a columnar screw-on part, and an adjustment cap is airtightly screwed onto the screw-on part. The adjustment cap covers the pen tip limiting part and the air jet nozzle. The adjustment cap is provided with a sealing cap that is directly opposite the pen tip limiting part. The sealing cap is made of elastic rubber material and has a through hole.

5. The novel inkjet printer according to claim 4, characterized in that: The front end of the screw joint is provided with an annular positioning groove, and a sealing ring is provided in the positioning groove to airtightly fit with the adjusting cap.

6. The novel inkjet printer according to claim 4, characterized in that: An elastic rubber gasket is also filled between the sealing cap and the front end of the air chamber housing.

7. The novel inkjet printer according to claim 1, characterized in that: The jet assembly also includes a miniature air pump located inside the spray gun housing, and the spray gun housing is also equipped with a power supply, a push-button switch, and a power indicator.

8. The novel inkjet printer according to claim 1, characterized in that: The outer wall of the annular positioning sleeve is provided with a protruding outer limiting ring, and the spray gun housing is provided with a positioning part that is fixedly engaged with the outer limiting ring.

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