CN218782512U

CN218782512U - Developing device

Info

Publication number: CN218782512U
Application number: CN202222809719.2U
Authority: CN
Inventors: 练文军
Original assignee: Tianhua Machine Equipment Co ltd
Current assignee: Shenzhen Tianhua Machinery Equipment Co ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2023-03-31
Anticipated expiration: 2032-10-25

Abstract

The embodiment of the application provides a developing device for spray liquid medicine to the production board, in order to realize the figure transfer of production board, the utility model discloses a pressure value in the different spouts of pressure controller control makes the pressure value inequality in each spout, the pressure value of spout reduces gradually in the direction towards transport structure, so that the lower part of production board is when shower nozzle blowout liquid medicine, the flow that receives to spray is lower, nevertheless under the action of gravity, the liquid medicine on production board upper portion flows down gradually along the production board, in order to supply the shower to the lower part of production board, thereby can guarantee the comparatively even effect that sprays of production board, promote the product yield.

Description

Developing device

Technical Field

The utility model belongs to the technical field of the developing device, especially, relate to a developing device.

Background

At present, in the vertical development production process, when the production plate is placed into the development spraying equipment for spraying, the lower part of the production plate is repeatedly sprayed due to the action of gravity, so that the spraying effect of each part of the production plate is different, the development effect of the production plate is poor, and the product yield is low.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a developing device, which aims to solve the problem that the developing effect of a production plate is poor in the prior art.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

provided is a developing device including:

the bracket structure is provided with a spraying cavity;

the conveying structure is arranged in the spraying cavity, connected with the support structure and used for limiting and connecting the production plate so as to convey the production plate into the spraying cavity; and

the spray structure, including spraying frame, pressure controller and a plurality of spray tube, spray the frame with the transport structure interval set up in spray the intracavity, it is a plurality of the spray tube interval set up in spray on the frame and all with pressure controller is connected, pressure controller is used for controlling each pressure value in the spray tube, every the spray tube all sets up along predetermineeing the direction, every be equipped with the shower nozzle that a plurality of intervals set up on the spray tube, the shower nozzle is used for spraying the liquid medicine in the spray tube to the production board on.

In an embodiment, the transport structure comprises a carrier plate member comprising:

the carrying plate frame is used for accommodating the production plate; and

and the plate clamp is fixedly arranged on the carrying plate frame and used for clamping the production plate.

In one embodiment, the plate clamp comprises a first clamping portion, an elastic connecting portion, a rotating connecting portion and a second clamping portion, the first clamping portion is fixed on the carrier plate frame, the first clamping portion is rotatably connected with the second clamping portion through the rotating connecting portion, the elastic connecting portion is arranged between a first end of the first clamping portion and a first end of the second clamping portion, and the elastic connecting portion is used for enabling a second end of the first clamping portion to be abutted to a second end of the second clamping portion.

In an embodiment, the second end of the first clamping portion and the second end of the second clamping portion are both provided with an avoidance groove.

In one embodiment, the transport structure comprises:

the first mounting frame is provided with a rotating shaft, and the rotating shaft can rotate on the first mounting frame;

the driving magnetic wheel is used for rotating under the action of driving force;

the driven magnetic wheel is sleeved on the rotating shaft and is driven by the magnetic force of the driving magnetic wheel to rotate so as to drive the rotating shaft to rotate; and

the friction wheel is sleeved on the rotating shaft and arranged at intervals with the driven magnetic wheel, and the friction wheel is used for contacting with the support plate frame to transport the production plate to the spraying cavity.

In an embodiment, the conveying structure further includes a second mounting frame and two limiting members, the two limiting members are oppositely arranged along the plumb direction, one limiting member is arranged on the first mounting frame, and the other limiting member is arranged on the second mounting frame.

In one embodiment, the support structure is provided with a swinging component, and the swinging component is in transmission connection with the spray rack.

In one embodiment, the swing member includes:

the third mounting rack is provided with a limiting column;

the driving motor is arranged on the third mounting frame;

the rotating wheel is provided with an eccentric hole deviating from the axis of the rotating wheel, and an output shaft of the driving motor is connected with the eccentric hole in a matching manner; and

the swing block comprises a main body, a first connecting portion and a second connecting portion, wherein the first connecting portion and the second connecting portion are respectively arranged on two sides of the main body, the main body is sleeved on the limiting column and can slide on the limiting column, the first connecting portion is arranged above the rotating wheel and abutted against the circumferential side wall of the rotating wheel, and the second connecting portion is connected with the spray frame.

In an embodiment, the circumferential side wall of the rotating wheel is provided with limit notches distributed along the circumferential direction, and the first connecting portion is arranged in the limit notches.

In one embodiment, the pressure controller comprises a pressure regulating valve and a pressure gauge, the pressure regulating valve is used for regulating the pressure of the liquid medicine in the spray pipe, and the pressure gauge is used for measuring the pressure value of the liquid medicine in the spray pipe.

In one embodiment, the number of the spraying structures is two, and the conveying structure is arranged between the two spraying structures.

In one embodiment, the support structure is provided with a viewing window.

The beneficial effect of this application lies in: the utility model discloses a pressure value in the different spouts of pressure controller control makes the pressure value inequality in each spout, and the pressure value along the direction of orientation transport structure upward spout reduces gradually to make the lower part of production board when shower nozzle blowout liquid medicine, the flow that receives to spray is lower, nevertheless under the action of gravity, the liquid medicine on production board upper portion flows down along the production board gradually, in order to supply the shower to the lower part of production board, thereby can guarantee the comparatively even effect that sprays of production board, promote the product yield.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a front view of a developing device according to an embodiment of the present invention;

fig. 2 is a side view of a developing device according to an embodiment of the present invention;

fig. 3 is a front view of a conveying structure according to an embodiment of the present invention;

fig. 4 is a perspective view of a conveying structure according to an embodiment of the present invention;

fig. 5 is a perspective view of a swing member according to an embodiment of the present invention;

fig. 6 is a perspective view of a carrier plate member according to an embodiment of the present invention;

fig. 7 is a perspective view of a plate clip according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

100. a conveying structure; 110. a first mounting bracket; 111. a rotating shaft; 112. a driving magnetic wheel; 113. a driven magnetic wheel; 114. a friction wheel; 120. a second mounting bracket; 121. a limiting component; 122. a swing block; 123. a main body; 124. a first connection portion; 125. a second connecting portion; 130. a carrier plate member; 131. a carrying plate frame; 140. a plate clamp; 141. a first clamping portion; 142. an elastic connection portion; 143. a rotation connecting part; 144. a second clamping portion; 150. an avoidance groove;

200. a scaffold structure; 210. a spray chamber; 220. a swinging member; 230. a third mounting bracket; 231. a limiting post; 232. a drive motor; 233. a rotating wheel; 234. a limiting notch; 235. an observation window;

300. a spraying structure; 310. a spray rack; 320. a nozzle; 330. a spray head; 340. a pressure controller; 350. and a pressure gauge.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further 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 application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and operate, and thus are not to be construed as limiting the present application, and the specific meanings of the above terms may be understood by those skilled in the art according to specific situations. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

Referring to fig. 1 to 3, an embodiment of the present application provides a developing apparatus for spraying a liquid medicine on a production board to realize pattern transfer of the production board, where the production board may be a PCB board.

The developing device includes a supporting structure 200, a conveying structure 100, and a spraying structure 300.

The supporting structure 200 may be a frame body formed by connecting multiple supporting rods, or a cabinet body formed by connecting multiple plates. As an example, the rack and the cabinet may be rectangular, and the rack structure 200 defines the spray chamber 210 therein, it being understood that when the rack structure 200 is a rack, the spray chamber 210 is open, and when the rack structure 200 is a cabinet, the spray chamber 210 is closed.

Conveying structure 100 is located in spraying chamber 210 and is connected with mounting structure 200, and conveying structure 100 can connect on mounting structure 200 detachably, and conveying structure 100 just is used for spacing connection production board in order to with the production board along preset direction transportation to in spraying chamber 210.

It will be appreciated that the transport structure 100 may transport the production board to a predetermined location as the production board requires a spraying operation within the spray chamber 210. And to ensure the smoothness of the conveying, the conveying structure 100 may be horizontally placed. Simultaneously in order to guarantee the effect that sprays, the production board can be vertically placed on transport structure 100 to aim at the face of production board and spray structure 300, reach the effect that sprays the area maximize, so need make transport structure 100 spacing connection production board, make the production board can not break away from transport structure 100 and keep vertical state by the in-process of transporting.

The spray structure 300 includes a spray rack 310, a pressure controller 340, and a plurality of spray tubes 320.

The spray frame 310 may be a polygonal frame, and the spray frame 310 is a rectangular frame, as an example.

It can be understood that if the spraying frame 310 and the conveying structure 100 are located at the same position, the production board collides with the spraying frame 310 during conveying the production board, which causes damage to the apparatus, so that the spraying frame 310 and the conveying structure 100 are spaced apart from each other in a plane taking the predetermined direction as a normal vector. As an example, the plane of the spray shelf 310 is parallel to the plane of the production board (not including coincidence) within the spray chamber 210.

The plurality of spray pipes 320 are arranged on the spray rack 310 at intervals and are used for being respectively communicated with a medicine water source, the arrangement direction of each spray pipe 320 is connected with the pressure controller 340, and the pressure controller 340 is used for controlling the pressure value in each spray pipe 320.

As an example, since each spray pipe 320 is parallel to the preset direction, the plurality of spray pipes 320 are disposed on the spray rack 310 in parallel, and exemplarily, the plurality of spray pipes 320 may be sequentially disposed on the spray rack 310 along the plumb direction, and a plurality of spray heads 330 are disposed on each spray pipe 320 at intervals, and the spray heads 330 are used for spraying the liquid medicine onto the production board.

As an example, the preset direction may be a horizontal direction, since the plurality of nozzles 330 on each nozzle 320 are at the same height, and the pressures of the liquid medicines in the nozzles 330 of the same nozzle 320 are similar, the spraying effects of the nozzles 330 of the same nozzle 320 on the production board are similar, so as to reduce the spraying difference of the nozzles 330 of the same nozzle 320 on the production board, and further control the pressure difference between the different nozzles 320 through the pressure controller 340, so that the pressures of the nozzles 340 downward along the plumb direction are gradually decreased, the pressure difference between the nozzles 320 is reduced, thereby reducing the difference of the spraying effects at various places of the production board, improving the developing effect, and increasing the product yield.

It is understood that the predetermined direction includes not only the horizontal direction, but also a direction having a certain inclination angle with the horizontal direction, for example, an inclination angle with the horizontal direction, which may be an acute angle, and although the pressure difference exists between the spray heads 330 of the same spray pipe 320, the pressure can still be adjusted by the pressure controller 340, and the effects of the above embodiments can also be achieved.

To sum up, the utility model discloses a pressure value in the different spray tubes 320 of pressure controller 340 control makes the pressure value inequality in each spray tube 320, and the pressure value of spray tube 320 reduces gradually in the direction towards transport structure 100 to make the lower part of production board when shower nozzle blowout liquid medicine, the flow that receives to spray is lower, nevertheless under the action of gravity, the liquid medicine on production board upper portion progressively flows down along the production board, in order to supply the shower to the lower part of production board, thereby can guarantee the comparatively even effect that sprays of production board, promote the product yield.

Referring to fig. 6, in an embodiment, the conveying structure includes a carrier plate 130, and the carrier plate 130 includes: a carriage frame 131 and a plate clip 140.

The carrier frame 131 is used to house the production board. As an example, the carrier frame 131 may be a rectangular plastic frame. The plate clamp 140 is fixedly arranged on the carrying plate frame 131 and used for clamping the production plate, so that the production plate is fixed during transportation, and the stability during spraying is ensured. The number of the plate clips 140 may be plural, and a plurality of the plate clips 140 may be symmetrically disposed on the carrier frame 131, thereby enhancing the stability of holding the production plate clips 140.

By way of example, the plate clips 140 may be made of a corrosion resistant plastic material.

Referring to fig. 7, in an embodiment, the plate clip 140 includes a first clamping portion 141, an elastic connection portion 142, a rotation connection portion 143, and a second clamping portion 144, the first clamping portion 141 is fixed on the carrier frame 131, the first clamping portion 141 and the second clamping portion 144 are rotatably connected through the rotation connection portion 143, the elastic connection portion 142 is disposed between a first end of the first clamping portion 141 and a first end of the second clamping portion 144, and the elastic connection portion 142 is used for enabling a second end of the first clamping portion 141 to abut against a second end of the second clamping portion 144.

As an example, the rotation connecting portion 143 is disposed between the first clamping portion 141 and the second clamping portion 144, and the rotation connecting portion 143 connects the middle positions of the first clamping portion 141 and the second clamping portion 144, so that when the second clamping portion 144 is ensured to rotate relative to the first clamping portion 141, a long arm of force is provided, and the purpose of saving labor is achieved.

It can be understood that the elastic connection portion 142 is connected to the ends of the first clamping portion 141 and the second clamping portion 144 far away from the production board, respectively, when the production board is clamped, the elastic connection portion 142 provides a primary elastic force to make the second end of the first clamping portion 141 abut against the second end of the second clamping portion 144, and when the production board needs to be taken down, the first end of the second clamping portion 144 is pressed to compress the elastic connection portion 142, so that the second end of the first clamping portion 141 is disconnected from the second end of the second clamping portion 144.

As an example, the elastic connection 142 may be a spring.

In an embodiment, in order to reduce the reduction of the spraying area of the production board caused by clamping, both the second end of the first clamping portion 141 and the second end of the second clamping portion 144 are provided with an avoiding groove 150. The avoiding groove 150 may be elongated. The avoidance groove 150 needs to penetrate the first and

second clamping portions

141 and 144.

Referring to fig. 4, in an embodiment, the conveying structure 100 includes a first mounting frame 110, a driving magnetic wheel 112, a driven magnetic wheel 113, and a friction wheel 114.

The first mounting bracket 110 is provided with a rotating shaft 111, and the rotating shaft 111 can rotate on the first mounting bracket 110. Specifically, the rotating shaft 111 rotates on the first mount 110 by being driven by the driven magnetic wheel 113.

The driving magnetic wheel 112 is used for rotating under the action of driving force. It will be appreciated that the driving magnetic wheel 112 may be connected to the output shaft of the motor for rotation by the output shaft of the motor. The axis of the rotating shaft 111 intersects with the rotation axis of the driving magnetic wheel 112.

The driven magnetic wheel 113 is sleeved on the rotating shaft 111 and is driven by the magnetic force of the driving magnetic wheel 112 to rotate so as to drive the rotating shaft 111 to rotate. As an example, the driven magnetic wheel 113 is in interference fit with the rotating shaft 111 to ensure that the rotating shaft 111 can be driven to rotate when the driven magnetic wheel 113 rotates.

Specifically, the driving magnetic wheel 112 can magnetically drive the driven magnetic wheel 113 to rotate, and mainly utilizes the principle that like poles attract and opposite poles of magnets are arranged and detached, so that repulsion is converted into driving force. In a static state, S poles and N poles of the two magnetic wheels correspond to each other. When the driving magnetic wheel 112 rotates, the magnetic pole position of the driving magnetic wheel 112 changes, and the driven magnetic wheel 113 is also pushed to rotate by magnetic force, so that the non-contact type transmission of power is realized.

The friction wheel 114 is sleeved on the rotating shaft 111, for example, the friction wheel 114 is in interference connection with the rotating shaft 111 to ensure that the friction wheel 114 can rotate along with the rotating shaft 111. The friction wheel 114 is used for contacting the carrier plate frame 131 to generate a friction force with the carrier plate frame 131 so as to transport the production board in the carrier plate frame 131 into the spraying chamber 210 along a predetermined direction. Friction wheel 114 and driven magnetic wheel 113 interval set up, reduce the damage to driven magnetic wheel 113 production when laying the production board.

In the present embodiment, the mechanical transmission structure is replaced by adopting a magnetic transmission structure. The emergence of the granule pollution phenomenon that the reducible wearing and tearing that produce because of mechanical type transmission structure further promote the product yield to transport carrier plate frame 131 through friction pulley 114, and not directly transport through driven magnetic wheel 113, can prolong driven magnetic wheel 113's life.

Referring to fig. 4, in an embodiment, the conveying structure 100 further includes a second mounting frame 120 and two limiting members 121, the two limiting members 121 are disposed opposite to each other along the plumb direction, one limiting member 121 is disposed on the first mounting frame 110, and the other limiting member 121 is disposed on the second mounting frame 120. The limiting component can be two rows of rollers arranged at intervals, and the carrying plate frame 131 is arranged between the two rows of rollers.

In an embodiment, since the size of the spraying structure 300 is limited, when some large production plates are sprayed, all parts of the production plates cannot be sprayed, and at this time, the spraying frame 310 needs to be moved to realize the overall spraying of the production plates, the support structure 200 is provided with the swinging component 220, the swinging component 220 is in transmission connection with the spraying frame 310, and the height of the spraying frame 310 is adjusted through the swinging component 220 to adapt to the production plates of various models.

In one embodiment, the swing member 220 includes: a third mounting bracket 230, a drive motor 232, a turning wheel 233, and a swing block 122.

The third mounting bracket 230 is provided with a stopper 231. As an example, there may be a plurality of limiting columns 231, and the plurality of limiting columns 231 are arranged along the height direction, and the plurality of limiting columns 231 are parallel to each other.

The driving motor 232 is disposed on the third mounting bracket 230. As an example, the driving motor 232 is fixed to the third mounting bracket 230. The driving motor 232 can be a servo motor, so that the control is convenient and the precision is high.

The rotary wheel 233 is provided with an eccentric hole deviating from the wheel center thereof, and an output shaft of the driving motor 232 is coupled to the eccentric hole in a matching manner. It is understood that when the output shaft of the driving motor 232 rotates, the rotating wheel 233 may be rotated centering on the eccentric hole. The rotating wheel 233 may be considered a cam at this time.

The swing block 122 includes a main body 123, a first connecting portion 124 and a second connecting portion 125, the first connecting portion 124 and the second connecting portion 125 are respectively disposed on two sides of the main body 123, the main body 123 is sleeved on the limiting post 231 and can slide on the limiting post 231, the first connecting portion 124 is disposed above the rotating wheel 233 and abuts against a circumferential side wall of the rotating wheel 233, and the second connecting portion 125 is connected with the spray frame 310.

It can be understood that when driving motor 232 drives and rotates wheel 233 to rotate, according to the pivoted angle difference, first connecting portion 124 is in different heights (can refer to the eccentric disc and do the stroke law of cam mechanism when the cam), thereby drive main part 123 and slide on spacing post 231, and then drive second connecting portion 125 through main part 123 and slide, thereby can drive and spray frame 310 and slide in spraying chamber 210, through the above-mentioned motion process, the position that sprays frame 310 can be very convenient regulation, thereby can the multiple production board of adaptation use.

Referring to fig. 4, in an embodiment, the circumferential side wall of the rotating wheel 233 is provided with a plurality of limiting notches 234 distributed along the circumferential direction, for example, the limiting notches 234 may be formed by cutting out a circular ring-shaped portion of the circumferential side wall of the rotating wheel 233, and the first connecting portion 124 is disposed in the limiting notches 234, so that the first connecting portion 124 is prevented from being separated from the rotating wheel 233.

Since each spray head 330 on each spray tube 320 is at the same height, the pressure of each spray head 330 is approximately equal, but between adjacent spray tubes 320, even if the gap between spray tubes 320 is reduced, there is a difference in height between spray tubes 320, so the pressure value of each spray tube 320 is approximately but still different, so in order to solve the above-mentioned problems:

referring to fig. 1 to 3, in one embodiment, the pressure controller 340 includes a pressure regulating valve for regulating the pressure of the liquid medicine in the nozzle 320 and a pressure gauge 350 for measuring the pressure of the liquid medicine in the nozzle 320. The pressure value of each spray pipe 320 can be controlled to be the same through the pressure regulating valve, and the pressure value of each spray pipe 320 can be detected through the pressure gauge 350, so that abnormal pressure values can be monitored, and flexible regulation and control can be performed.

As a possible embodiment, the pressure controller may only have a pressure regulating valve, and only the pressure regulating valve is needed to regulate each nozzle 320.

In an embodiment, in order to spray two opposite surfaces of the production board simultaneously and accelerate the spraying efficiency, the spraying structures 300 are provided in two numbers, the conveying structure 100 is arranged between the two spraying structures 300, when the conveying structure 100 conveys the production board to a specified position, the two spraying structures 300 are started simultaneously to spray the production board, in some embodiments, the spraying structure 300 on one side of the production board can also be started only, so that the purpose of unilateral spraying is achieved.

In one embodiment, the rack structure 200 is provided with an observation window 235, through which the spraying status of the production board can be observed, and it can be conveniently observed whether each spray head 330 is operating normally.

In one embodiment, to ensure uniformity of the sprayed liquid medicine, a plurality of spray pipes 320 are equidistantly disposed on the spray rack 310.

The above are merely alternative embodiments of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A developing device, characterized by comprising:

the bracket structure is provided with a spraying cavity;

2. The developing device according to claim 1, wherein: the transport structure includes a carrier plate component comprising:

a carrier frame for receiving the production board; and

3. The developing device according to claim 2, wherein: the plate clip comprises a first clamping part, an elastic connecting part, a rotating connecting part and a second clamping part, wherein the first clamping part is fixed on the carrier plate frame, the first clamping part and the second clamping part are connected in a rotating mode through the rotating connecting part, the elastic connecting part is arranged between the first end of the first clamping part and the first end of the second clamping part, and the elastic connecting part is used for enabling the second end of the first clamping part to be abutted to the second end of the second clamping part.

4. The developing device according to claim 3, wherein: the second end of first clamping part with the second end of second clamping part all is equipped with dodges the groove.

5. The developing device according to claim 2, wherein: the conveying structure further comprises:

and the friction wheel is sleeved on the rotating shaft and arranged at intervals with the driven magnetic wheel, and the friction wheel is used for contacting with the carrier plate frame so as to transport the production plate to the spraying cavity.

6. The developing device according to claim 5, wherein: the conveying structure further comprises a second mounting frame and two limiting parts, wherein the two limiting parts are oppositely arranged along the direction of the plumb bob, one limiting part is arranged on the first mounting frame, and the other limiting part is arranged on the second mounting frame.

7. The developing device according to claim 1, wherein: the support structure is provided with a swinging component, and the swinging component is in transmission connection with the spraying frame.

8. The developing device according to claim 7, wherein: the swing member includes:

the third mounting rack is provided with a limiting column;

the driving motor is arranged on the third mounting rack;

9. The developing device according to claim 8, wherein: the rotating wheel is characterized in that a limiting notch distributed along the circumferential direction is formed in the circumferential side wall of the rotating wheel, and the first connecting portion is arranged in the limiting notch.

10. The developing device according to claim 1, wherein: the pressure controller comprises a pressure regulating valve and a pressure gauge, the pressure regulating valve is used for regulating the pressure of the liquid medicine in the spray pipe, and the pressure gauge is used for measuring the pressure value of the liquid medicine in the spray pipe.

11. The developing device according to claim 1, wherein: the spraying structure is provided with two, and the conveying structure is arranged between the two spraying structures.

12. The developing device according to claim 1, wherein: and the support structure is provided with an observation window.