Spray needle control mechanism and spray pen

Abstract

The utility model relates to a jet drawing tool applied to the technical field of jet drawing, and particularly discloses a jet needle control mechanism and a jet pen. The spray needle control mechanism comprises a control sliding block, an elastic mechanism and a driving mechanism, and the control sliding block is movably arranged in the axial direction; the elastic mechanism is arranged behind the control sliding block, and elastic potential energy of the elastic mechanism drives the control sliding block to move forwards; the driving mechanism is used for driving the control sliding block to move backwards, and the driving mechanism is fixedly connected with the control sliding block or makes direct contact with the control sliding block. According to the structure, the driving mechanism directly acts on the control sliding block, the structural form that a driving rod in a traditional air brush is indirectly driven through an elastic piece is changed, the displacement stroke of the spray needle is completely consistent with the displacement stroke of the control sliding block, the displacement stroke of the spray needle is more stable, and a user can more accurately control the pigment flow.

Description

Technical Field

[0001] This utility model relates to inkjet printing tools applied in the field of inkjet printing technology, specifically to an inkjet needle control mechanism and an inkjet pen. Background Technology

[0002] An airbrush is an important printing tool for spraying colored paint in a mist form. Chinese utility model patent CN209348868U discloses an airbrush, including a handle, a nozzle at the front end of the handle, a nozzle orifice on the nozzle, a liquid flow channel forming inside the handle that communicates with the nozzle orifice, a material cup connected to the handle that communicates with the liquid flow channel, a nozzle that can move back and forth installed in the liquid flow channel, a drive rod connected to the handle and used to drive the nozzle to move back and forth, the nozzle can move forward under the action of the drive rod and its front end can abut against the nozzle orifice, and can also move backward under the action of the drive rod to release the nozzle orifice; an air inlet valve is connected to the handle, an airflow channel forming inside the handle that communicates with the air outlet of the air inlet valve, the air inlet of the air inlet valve is connected to external compressed gas, and the outlet of the airflow channel communicates with the nozzle orifice.

[0003] In the airbrush disclosed in the aforementioned patent, the drive rod indirectly drives the tail structure connected to the nozzle through an elastic sheet, thereby causing the nozzle to move backward. In this driving method, the correspondence between the displacement stroke of the drive rod and the displacement stroke of the nozzle is directly related to the degree of deformation of the elastic sheet. The magnitude of the pressure applied by the drive rod to the elastic sheet and the speed may affect the degree of deformation of the elastic sheet. That is, when the displacement stroke of the drive rod is constant, the magnitude of the pressure applied to the elastic sheet and the speed may cause the displacement stroke of the nozzle to be unstable, making it difficult for the user to accurately control the ink flow rate, resulting in insufficient control precision. Summary of the Invention

[0004] The technical problem to be solved by this utility model is the technical defect in the prior art where the displacement stroke of the nozzle is unstable due to the drive rod controlling the nozzle displacement stroke through the elastic sheet, making it difficult for users to accurately control the pigment flow rate.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: A needle spraying control mechanism, comprising at least:

[0006] A control slider, wherein the control slider is movably disposed along the axial direction;

[0007] An elastic mechanism is provided behind the control slider, and the elastic potential energy of the elastic mechanism drives the control slider to move forward.

[0008] A drive mechanism is used to drive the control slider to move backward. The drive mechanism is fixedly connected to the control slider or in direct contact with the control slider.

[0009] In a preferred embodiment, the driving mechanism includes a driving rod, a hinged end disposed at one end of the driving rod, and an operating end disposed at the other end of the driving rod.

[0010] In a preferred embodiment, the control slider is provided with an operating hole for accommodating the drive rod to pass through. The opening of the operating hole near the operating end is clearance-fitted with the drive rod. The inner walls of the operating holes on the front and rear sides of the drive rod are provided with clearance grooves that extend obliquely forward and backward from the operating end side to the hinge end side, respectively.

[0011] This utility model also discloses an airbrush, which includes at least the aforementioned nozzle control mechanism.

[0012] In a preferred embodiment, the device further includes a handle, the interior of which is provided with a needle channel and a control channel, and a first limiting step is provided at the junction of the needle channel and the control channel; the control slider is located in the control channel, and the handle is provided with a slot for accommodating the drive rod to swing back and forth around the hinge end, the slot extending into the control channel.

[0013] In a preferred embodiment, the control slider includes a small diameter section located on the front side and a large diameter section located on the rear side, with a third limiting step formed between the small diameter section and the large diameter section.

[0014] In a preferred embodiment, the control channel includes a small-diameter channel adapted to the small-diameter section and a large-diameter channel adapted to the large-diameter section, wherein a second limiting step adapted to the third limiting step is formed between the small-diameter channel and the large-diameter channel.

[0015] In a preferred embodiment, the nozzle assembly further includes a nozzle, a limiting end disposed at the rear end of the nozzle, and a first spring sleeved on the nozzle. The first spring is located between the first limiting step and the limiting end and drives the nozzle to move backward. The elastic mechanism is a second spring, and the elastic force of the second spring is greater than that of the first spring.

[0016] In a preferred embodiment, a stroke control lever is further provided on the rear side of the control slider, and an adjustment structure for adjusting the front and rear positions of the stroke control lever is further provided between the handle and the stroke control lever.

[0017] In a preferred embodiment, the adjusting structure includes an adjusting nut that is rotatably connected to the handle, the stroke control rod is provided with an external thread that is thread-fitted to the adjusting nut, and the second spring is sleeved on the stroke control rod.

[0018] Compared with the prior art, the nozzle control mechanism and airbrush of this utility model have the following advantages: the drive mechanism acts directly on the control slider, which changes the structure of the traditional airbrush where the drive rod is indirectly driven by an elastic sheet, so that the displacement stroke of the nozzle is completely consistent with the displacement stroke of the control slider, the displacement stroke of the nozzle is more stable, and the user can control the pigment flow more precisely. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the airbrush structure shown in Example 1;

[0020] Figure 2 This is an assembly diagram of the front handle, nozzle, spray head, and spray needle assembly in Embodiment 1.

[0021] Figure 3 This is a schematic diagram of the drive mechanism in Example 1;

[0022] Figure 4 This is a schematic diagram of the control slider structure in Example 1;

[0023] Figure 5 This is a schematic diagram of the nozzle assembly in Example 1;

[0024] Figure 6 This is a schematic diagram of the handle body in Embodiment 1;

[0025] Figure 7 This is a schematic diagram of the stroke control lever and adjustment structure in Example 1;

[0026] Figure 8 This is a schematic diagram of the airbrush structure shown in Example 2. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", 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 utility model 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 utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] Example 1,

[0031] One type of airbrush in this embodiment, such as Figure 1 As shown, the device includes a handle 10, a nozzle assembly, a nozzle control mechanism, a nozzle head 50, a nozzle 60, and an airflow connection valve 70. The nozzle head 50 and nozzle 60 are located at the front end of the handle 10. An airflow gap 61 is provided between the nozzle 60 and the nozzle head 50, and a liquid flow gap 51 is provided between the nozzle head 50 and the nozzle 40. Compressed air flows through the airflow gap 61, and pigment flows through the liquid flow gap 51. The compressed air creates a negative pressure at the front end of the nozzle 60, atomizing the pigment in the liquid flow gap 51 before it is sprayed out. It should be noted that the above structure is a conventional structure of existing airbrushes and will not be described in detail here.

[0032] In this embodiment, the handle 10 is provided with a nozzle channel 111 and a control channel inside, and a first limiting step 114 is provided at the junction of the nozzle channel 111 and the control channel.

[0033] In this embodiment, as Figure 1 , Figure 2 as well as Figure 5 As shown, the nozzle assembly includes a nozzle 40, a limiting end 41 disposed at the rear end of the nozzle, and a first spring 42 sleeved on the nozzle. The first spring 42 is located between the first limiting step 114 and the limiting end 41, and is used to drive the nozzle 40 to move backward. That is, the first spring 42 is a compression spring, normally in a compressed state, and under the action of elastic potential energy, it causes the nozzle to have a tendency to move backward.

[0034] As a special feature of this embodiment, such as Figure 1 , Figure 4 As shown, the nozzle control mechanism includes a control slider 30, a drive mechanism 20, and a second spring 82 as an elastic mechanism. The control slider 30 is located within the control channel and abuts against the rear side of the limiting end 41. A second spring 82 is provided on the side of the control slider 30 away from the nozzle 40. This second spring is a compression spring, normally in a compressed state. Under the action of elastic potential energy, it causes the control slider 30 to have a forward tendency, thus driving the control slider 30 to move forward.

[0035] As a special feature of this embodiment, the elastic force of the second spring 82 is greater than that of the first spring 42. Under normal conditions, the nozzle 40 and the control slider 30 are in the front limit position under the action of the elastic potential energy of the second spring 82.

[0036] In this embodiment, when the inkjet needs to control the printing accuracy by adjusting the displacement of the nozzle during use, the drive mechanism 20 directly acts on the control slider 30, driving the control slider 30 to move backward. In this state, the second spring 82 is further compressed. After the control slider 30 moves backward a certain distance, the nozzle 40 follows the control slider 30 backward under the elastic potential energy of the first spring 42. Furthermore, the displacement distance of the nozzle 40 is completely consistent with the displacement distance of the control slider 30. Compared with the indirect driving method using an elastic sheet in the prior art, the displacement distance of the nozzle 40 is more stable, allowing users to control the ink flow more precisely.

[0037] As a special feature of this embodiment, such as Figure 1 , Figure 3 , Figure 6 As shown, the driving mechanism 20 includes a driving rod 21, a hinged end 22 disposed at one end of the driving rod, and an operating end 23 disposed at the other end of the driving rod. The handle 10 has a hinged position 122 internally configured to mate with the hinged end. It should be noted that the hinged form between the hinged end 22 and the hinged position 122 is a conventional technique in the art, and its specific connection form is not limited in this embodiment. For example, it can be a spherical end and a ball socket fit, or a pin and a pin hole fit.

[0038] In this embodiment, preferably, the upper surface of the operating end 23 is provided with a damping structure 24. When the user operates, the damping structure 24 provides greater resistance and better feedback. Of course, the specific form of the damping structure is not limited in this embodiment. For example, the upper surface of the operating end 23 can be provided with a concave-convex structure, several protrusions, spaced protrusions, etc.

[0039] In this embodiment, the handle 10 is provided with a slot 126 for accommodating the drive rod 21 to swing back and forth around the hinge end, and the slot extends through the control channel.

[0040] As a special feature of this embodiment, such as Figure 1 , Figure 4As shown, the control slider 30 is provided with an operating hole 34 to accommodate the drive rod 21. The opening of the operating hole 34 near the operating end is clearance-fitted with the drive rod 21. The inner walls of the operating holes on both sides of the drive rod are provided with clearance grooves 35 that extend obliquely forward and backward from the operating end side to the hinge end side, respectively. The purpose of the operating hole 34 is to ensure that when the back-and-forth swing of the drive rod 21 is converted into the back-and-forth movement of the control slider 30, no motion interference occurs, allowing the operating rod to swing between the clearance grooves 35 on both sides.

[0041] In this embodiment, the swing of the drive rod 21 directly acts on the control slider 30. Without an elastic element as the power transmission structure, the displacement stroke of the control slider is more stable, which in turn makes the displacement stroke of the nozzle more stable, reducing the difficulty for the user to control the printing accuracy.

[0042] As a unique feature of this embodiment, the control slider 30 includes a small-diameter section 31 located at the front and a large-diameter section 33 located at the rear, with a third limiting step 32 formed between the small-diameter section 31 and the large-diameter section 33. Correspondingly, the control channel includes a small-diameter channel 124 adapted to the small-diameter section 31 and a large-diameter channel 125 adapted to the large-diameter section 32, with a second limiting step 127 formed between the small-diameter channel 124 and the large-diameter channel 125, adapted to the third limiting step 32. Based on the mutual cooperation of the third limiting step 32 and the second limiting step 127, the position of the control slider 30 is limited, restricting the forward limit position of the control slider and the nozzle.

[0043] In this embodiment, preferably, the second and third limiting steps are tapered together. The advantage of the tapered fit is that it creates a guiding effect between them, and the collision noise is also relatively small.

[0044] Based on the special structural design of the airbrush in this embodiment, this embodiment designs a structural form that is easy to assemble. The handle 10 includes a front handle 11, a middle handle 12 and a rear handle 13 connected in sequence. The nozzle 50 and the nozzle 60 are disposed at the front end of the front handle 11.

[0045] like Figure 1 , Figure 2 As shown, the front handle 11 is provided with a first airflow channel 112 communicating with the airflow gap 61, such as... Figure 1 , Figure 6 As shown, the middle handle 12 is provided with a second airflow channel 123 that communicates with the first airflow channel 112, and the second airflow channel 123 is connected to the airflow connection valve 70. Preferably, in this embodiment, the airflow connection valve 70 is a normally open valve and is connected to a compressed air source during use.

[0046] In this embodiment, the front handle 11 is also provided with a pigment cup holder 113 that communicates with the liquid flow gap 51. The pigment cup holder 113 is used to connect the pigment cup to provide liquid pigment for inkjet printing.

[0047] In this embodiment, as Figure 1 , Figure 6 As shown, a gripping part 121 is provided on the middle handle 12, and the airflow connection valve 70 is installed on the gripping part.

[0048] In this embodiment, the small-diameter channel 124 and the large-diameter channel 125 are disposed inside the middle handle body, and the slot 126 is also disposed on the middle handle body.

[0049] As a special feature of this embodiment, such as Figure 1 , Figure 7 As shown, a stroke control lever 80 is also provided on the rear side of the control slider 30. The position of the stroke control lever 80 is adjustable, that is, the distance between the stroke control lever 80 and the control slider 30 is adjustable. By adjusting the position of the stroke control lever 80, the rear limit position of the control slider 30 can be adjusted, that is, the displacement stroke of the control slider 30 can be adjusted. With this setting, the displacement stroke of the nozzle can be adjusted according to the printing requirements, and the stroke range control is more precise.

[0050] Preferably, in this embodiment, the stroke control rod 80 is installed in the stroke control cavity 131 of the rear handle 13. The adjustment structure includes an adjusting nut 81 that is rotatably connected to the rear handle 13, and the stroke control rod 80 is provided with an external thread 83 that is threadedly adapted to the adjusting nut 81.

[0051] Preferably, the second spring 82 is sleeved on the stroke control rod 80, and its two ends abut against the end faces of the control slider 30 and the rear handle, respectively.

[0052] Preferably, in this embodiment, the nozzle, spray needle, first spring, and second spring are made of metal, while the remaining structure is made of plastic. Traditional airbrushes, however, use more metal. The purpose of this embodiment is to reduce the material cost of the airbrush by minimizing the amount of metal used, thus meeting the requirement of using the airbrush as a disposable tool. Furthermore, in this embodiment, the spray needle is significantly shorter than in existing technologies, resulting in lower material costs and a more pronounced cost advantage.

[0053] Example 2,

[0054] The airbrush of this embodiment differs from that of Embodiment 1 in that the structure of the nozzle control mechanism is different. Specifically, as follows: Figure 8As shown, the driving mechanism is an operating rod 80 fixedly connected to the control slider 30. Correspondingly, the handle 10 is provided with a slot 126 for accommodating the operating rod to pass through and move back and forth.

[0055] In this embodiment, the operating lever 80 directly drives the control slider 30 to move backward, instead of converting the swing of the driving lever into the movement of the control slider 30 as in Embodiment 1. This provides a new technical concept for directly driving the control slider. Preferably, in this embodiment, the control slider 30 does not need to be a variable diameter structure; correspondingly, the control channel is also a constant diameter structure adapted to the control slider 30.

[0056] Preferably, in this embodiment, the operating lever 80 and the grip 121 are located on the same side, forming a gun-like structure.

[0057] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A needle control mechanism, characterized in that, At least including: A control slider, wherein the control slider is movably disposed along the axial direction; An elastic mechanism is provided behind the control slider, and the elastic potential energy of the elastic mechanism drives the control slider to move forward. A drive mechanism is used to drive the control slider to move backward. The drive mechanism is fixedly connected to the control slider or in direct contact with the control slider.

2. The nozzle control mechanism according to claim 1, characterized in that, The driving mechanism includes a driving rod, a hinged end disposed at one end of the driving rod, and an operating end disposed at the other end of the driving rod.

3. The nozzle control mechanism according to claim 2, characterized in that, The control slider is provided with an operating hole to accommodate the drive rod. The opening of the operating hole near the operating end is in clearance fit with the drive rod. The inner walls of the operating holes on the front and rear sides of the drive rod are provided with clearance grooves that extend obliquely forward and backward from the operating end side to the hinge end side, respectively.

4. An airbrush, characterized in that, It includes at least the needle control mechanism as described in claim 3.

5. The airbrush according to claim 4, characterized in that, It also includes a handle, the inside of which is provided with a needle channel and a control channel, and a first limiting step is provided at the junction of the needle channel and the control channel; the control slider is located in the control channel, and the handle is provided with a slot to accommodate the drive rod swinging back and forth around the hinge end, the slot extending into the control channel.

6. The airbrush according to claim 5, characterized in that, The control slider includes a small diameter section on the front side and a large diameter section on the rear side, with a third limiting step formed between the small diameter section and the large diameter section.

7. The airbrush according to claim 6, characterized in that, The control channel includes a small-diameter channel adapted to the small-diameter section and a large-diameter channel adapted to the large-diameter section, and a second limiting step adapted to the third limiting step is formed between the small-diameter channel and the large-diameter channel.

8. The airbrush according to any one of claims 5-7, characterized in that, It also includes a nozzle assembly, which includes a nozzle, a limiting end disposed at the rear end of the nozzle, and a first spring sleeved on the nozzle. The first spring is located between the first limiting step and the limiting end and drives the nozzle to move backward. The elastic mechanism is a second spring, and the elastic force of the second spring is greater than that of the first spring.

9. The airbrush according to claim 8, characterized in that, A stroke control lever is also provided on the rear side of the control slider, and an adjustment structure for adjusting the front and rear positions of the stroke control lever is also provided between the handle and the stroke control lever.

10. The airbrush according to claim 9, characterized in that, The adjustment structure includes an adjustment nut that is rotatably connected to the handle, and the stroke control rod is provided with an external thread that is thread-fitted to the adjustment nut. The second spring is sleeved on the stroke control rod.

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