Chain type PCB conveying mechanism
By introducing positioning and anti-displacement mechanisms and rapid cooling mechanisms into the chain conveyor system, the problems of unstable positioning and untimely cooling of PCB boards during the soldering process are solved, resulting in better soldering performance.
Patent Information
- Application Number
- CN202423126935.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-18
AI Technical Summary
The existing chain conveyor mechanism is not good at positioning and preventing displacement of the PCB board body during use, and it does not have a rapid cooling function, resulting in poor soldering effect and problems such as low solder joint brightness, easy breakage or peeling.
A chain conveyor mechanism including a positioning and anti-displacement mechanism and a rapid cooling mechanism was designed. The PCB board is stably positioned by magnets and positioning clips, and the PCB board surface is rapidly cooled by a rapid cooling system consisting of a cooling box, a blower and a screen.
It achieves stable positioning of the PCB board during the soldering process, avoids displacement during soldering, and improves soldering quality through rapid cooling, preventing problems such as low solder joint brightness, breakage or peeling, and improving the soldering effect.
Smart Images
Figure CN223613569U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to PCB board soldering technical field, concretely is a chain board conveying mechanism for PCB board soldering. BACKGROUND
[0002] The power adapter is the power supply voltage conversion equipment of small portable electronic equipment and electronic appliance, generally by shell, transformer, inductor, capacitor, control IC, PCB board and so on component composition, wherein, the assembling of numerous components on the PCB board is the most widely used technology and process that surface mount technology, and the reflow soldering machine is a kind of welding equipment commonly used in surface mount technology, and now need a chain board conveying mechanism for PCB board soldering.
[0003] The service life of the existing chain board conveying mechanism will not be too high, and the chain will be easy to loosen after long-term use, and the chain and the chain link will be separated, in addition, the existing chain board conveying mechanism also has some shortcomings to some extent, the stability requirement of the chain board conveying mechanism to the PCB board body is higher when using, therefore, the PCB board body needs to be positioned and prevented from displacement, the positioning and displacement prevention effect of the existing chain board conveying mechanism to the PCB board body is not good enough when using, which can easily lead to the phenomenon that the chain board conveying mechanism is displaced when soldering the surface of the PCB board body, so that the chain board conveying mechanism is inconvenient to operate when soldering, the surface of the PCB board body needs to be cooled when using the chain board conveying mechanism, the existing chain board conveying mechanism usually does not have the function of rapidly cooling the surface of the PCB board body when using, which can easily lead to the phenomenon that the PCB board is not cooled in time after soldering, and the brightness of the welding point on the surface of the PCB board body is not high, which can easily lead to the phenomena such as fracture and peeling, and reduces the quality of the surface soldering of the PCB board body, so that the soldering effect of the chain board conveying mechanism on the surface of the PCB board body is reduced. SUMMARY
[0004] The utility model aims at providing a chain board conveying mechanism for PCB board soldering to solve the problems that the positioning and displacement prevention effect of the chain board conveying mechanism to the PCB board body is not good enough when using, and the chain board conveying mechanism usually does not have the function of rapidly cooling the surface of the PCB board body when using.
[0005] In order to achieve the above object, the utility model provides the following technical scheme: A chain board conveying mechanism for PCB soldering, including mechanism frame body, the surface of mechanism frame body is provided with rack body, the surface of rack body is installed with control button, the inner wall of mechanism frame body is installed with board body, the inside of rack body is installed with support frame, one end of support frame extends to the outside of rack body, the inside of rack body is all provided with fixed frame, the surface of support frame is installed with conveying belt, the surface of conveying belt is placed with PCB body, the inside of fixed frame is provided with rotating tooth disc, the inner wall of rotating tooth disc and fixed frame is mutually rotating and is matched, the surface of rotating tooth disc is installed with belt pulley, the surface of belt pulley is all installed with equal interval chain frame body, the inner wall of chain frame body and fixed frame is mutually sliding and is matched, the surface of chain frame body and PCB body is all provided with positioning displacement prevention mechanism, the inside of positioning displacement prevention mechanism contains first magnet, second magnet, positioning clamp and positioning slot, the inside of rack body and board body is provided with quick cooling mechanism, the inside of quick cooling mechanism contains refrigeration box, first air blower and quick cooling assembly.
[0006] Preferably, one end of the fixed frame extends to the outside of the rack body, the surface of the fixed frame is provided with a mounting frame, the surface of the mounting frame is fastened with the surface of the board and the fixed frame by screws respectively, a rotating motor is installed in the inside of the fixed frame, the input end of the rotating motor is electrically connected with the output end of the control button, a rotating shaft is installed on the output end of the rotating motor through a shaft coupling, and one end of the rotating shaft is fixed with the surface of the center position of the rotating tooth disc, the surface of the rotating tooth disc is in contact with the surface of the bottom position of the PCB body, and the surface of the mechanism frame body is provided with a transparent observation window.
[0007] Preferably, the surface of the chain frame body is provided with a first magnet, the surface of the bottom position of the PCB body is provided with a second magnet for positioning the PCB body, and the surface of the second magnet and the first magnet is magnetically attracted to each other.
[0008] Preferably, the inner wall of the chain frame body is provided with a positioning clamp for preventing displacement of the PCB body, and the surface of the bottom position of the PCB body is provided with a positioning slot, and the surface of the positioning slot and the positioning clamp is mutually clamped and matched.
[0009] Preferably, the rapid cooling assembly is arranged inside the plate body and the rack body, and the rapid cooling assembly is composed of a refrigerating device, a screen body and a second air blower, the surface of the plate body is provided with a refrigerating box, the inside of the refrigerating box is provided with the second air blower, the input end of the second air blower is electrically connected with the output end of the control button, the input end of the second air blower penetrates through the refrigerating box and extends to the outside of the refrigerating box, and the inside of the refrigerating box is provided with the screen body for filtering impurities in air.
[0010] Preferably, the inside of the refrigerating box is provided with the refrigerating device for refrigerating air in the refrigerating box, the input end of the refrigerating device is electrically connected with the output end of the control button, the surface of the refrigerating box is provided with the first air blower, the input end of the first air blower is electrically connected with the output end of the control button, and the input end of the first air blower penetrates through the refrigerating box and extends to the inside of the refrigerating box.
[0011] Compared with the prior art, the chain plate conveying mechanism for PCB soldering has the advantages that: the chain plate conveying mechanism can position the PCB body on the surface of the conveying belt, avoids the displacement of the PCB body when the chain plate conveying mechanism is used for soldering the surface of the PCB body, makes the chain plate conveying mechanism more convenient to operate when soldering, avoids the phenomenon that the PCB body cannot be cooled in time after soldering, avoids the brightness of the soldering points on the surface of the PCB body from being low, avoids the phenomena of cracking and peeling, improves the quality of the soldering on the surface of the PCB body, and makes the soldering effect of the chain plate conveying mechanism on the surface of the PCB body better.
[0012] 1. The positioning and displacement prevention mechanism is arranged, when the conveying belt drives the PCB body to move to the surface of the chain rack body, the first magnet on the surface of the chain rack body moves to contact the surface of the second magnet on the bottom of the PCB body, the first magnet and the second magnet jointly avoid the displacement of the PCB body on the surface of the chain rack body, at this time, the chain rack body drives the positioning clamping piece to be clamped in the positioning clamping groove, the positioning clamping piece and the positioning clamping groove jointly avoid the displacement of the PCB body on the surface of the chain rack body, the soldering effect of the chain plate conveying mechanism on the surface of the PCB body is better, the function of positioning and displacement prevention of the chain plate conveying mechanism on the PCB body is realized, the chain plate conveying mechanism can position the PCB body on the surface of the conveying belt, avoids the displacement of the PCB body when the chain plate conveying mechanism is used for soldering the surface of the PCB body, and makes the chain plate conveying mechanism more convenient to operate when soldering.
[0013] 2、By setting has the quick cooling mechanism, control refrigeration box inside The second air blower work, under the action of the second air blower It will be outside air into the refrigeration box inside, under the action of the screen body The dust in the air is filtered and treated, button control refrigeration box inside The refrigerator works, under the action of the refrigerator The air in the refrigeration box is cooled and treated, control refrigeration box surface The first air blower works, under the action of the first air blower The cold air in the refrigeration box is introduced into the surface of the PCB board body, and the surface of the PCB board body is quickly cooled and treated, realizing the function of the chain plate conveying mechanism to quickly cool the surface of the PCB board body, so that the chain plate conveying mechanism can avoid the phenomenon that the PCB board cannot be cooled in time after soldering, avoid the brightness of the soldering points on the surface of the PCB board body not being high, prone to cracking, peeling and other phenomena, improve the quality of soldering on the surface of the PCB board body, and make the soldering effect of the chain plate conveying mechanism on the surface of the PCB board body better. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;
[0015] Figure 2 It is a side view sectional structure schematic diagram of the utility model;
[0016] Figure 3 It is a front view sectional enlarged structure schematic diagram of the utility model;
[0017] Figure 4 It is a three-dimensional structure schematic diagram of the utility model; Figure 2 It is an enlarged structure schematic diagram of the positioning displacement prevention mechanism in the utility model;
[0018] Figure 5 It is an enlarged structure schematic diagram of the quick cooling mechanism in the utility model; Figure 2
[0019] In the drawing: 1, mechanism frame body; 101, fixed frame; 102, rack body; 103, control button; 104, support frame; 105, conveying belt; 106, plate body; 107, mounting frame; 108, rotating motor; 109, pulley; 110, PCB board body; 111, chain frame body; 112, transparent observation window; 113, rotating toothed disc; 2, positioning displacement prevention mechanism; 21, first magnet; 22, second magnet; 23, positioning clamping piece; 24, positioning clamping groove; 3, quick cooling mechanism; 31, refrigeration box; 32, first air blower; 33, quick cooling assembly; 331, refrigerator; 332, screen body; 333, second air blower. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. In addition, the terms "first", "second", "third", "upper", "lower", "left", "right" and the like are only used for the purpose of description, and cannot be understood as indicating or implying relative importance. Meanwhile, in the description of the utility model, unless explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.
[0021] The structure of the chain plate conveying mechanism for PCB soldering provided by the utility model is shown as Figure 1 and Figure 2 The surface of the mechanism frame body 1 is provided with a rack body 102, the rack body 102 is provided with a control button 103, the model of the control button 103 can be selected as LA series, the inner wall of the mechanism frame body 1 is provided with a plate body 106, the inside of the rack body 102 is provided with a supporting frame 104, one end of the supporting frame 104 extends to the outside of the rack body 102, the inside of the rack body 102 is provided with a fixing frame 101, one end of the fixing frame 101 extends to the outside of the rack body 102, the surface of the fixing frame 101 is provided with a mounting frame 107, the surface of the mounting frame 107 is respectively screwed and fastened with the surface of the plate body 106 and the fixing frame 101 through screws, the surface of the supporting frame 104 is provided with a conveying belt 105, the surface of the conveying belt 105 is placed with a PCB body 110, the inside of the fixing frame 101 is provided with a rotating tooth disc 113, the rotating tooth disc 113 and the inner wall of the fixing frame 101 are rotatably matched, the surface of the rotating tooth disc 113 is provided with a belt pulley 109, the surface of the belt pulley 109 is provided with equidistant chain frame bodies 111, the chain frame bodies 111 and the inner wall of the fixing frame 101 are slidably matched, the inside of the fixing frame 101 is provided with a rotating motor 108, the model of the rotating motor 108 can be selected as JO series, the input end of the rotating motor 108 is electrically connected with the output end of the control button 103, the output end of the rotating motor 108 is provided with a rotating shaft through a shaft coupling, and one end of the rotating shaft is fixed with the surface of the center position of the rotating tooth disc 113, the surface of the rotating tooth disc 113 is in contact with the surface of the bottom position of the PCB body 110, and the surface of the mechanism frame body 1 is provided with a transparent observation window 112.
[0022] Further, as Figure 2 and Figure 4As shown, the chain rack body 111 and the surface of the PCB plate body 110 are provided with the positioning displacement prevention mechanism 2, the inside of the positioning displacement prevention mechanism 2 contains the first magnet 21, the second magnet 22, the positioning clamping piece 23 and the positioning clamping groove 24, the surface of the chain rack body 111 is installed with the first magnet 21, the surface of the bottom position of the PCB plate body 110 is installed with the second magnet 22 for positioning the PCB plate body 110, the surface of the second magnet 22 and the first magnet 21 is mutually magnetically attracted and matched, the inner wall of the chain rack body 111 is installed with the positioning clamping piece 23 for preventing the displacement of the PCB plate body 110, the surface of the bottom position of the PCB plate body 110 is provided with the positioning clamping groove 24, and the surface of the positioning clamping groove 24 and the positioning clamping piece 23 is mutually clamped and matched.
[0023] When the chain rack body 111 drives the PCB plate body 110 to move to the surface of the chain rack body 111, the first magnet 21 on the surface of the chain rack body 111 moves to the surface of the second magnet 22 at the bottom of the PCB plate body 110, and under the joint action of the first magnet 21 and the second magnet 22, the phenomenon of displacement of the PCB plate body 110 on the surface of the chain rack body 111 is avoided, at this time, the chain rack body 111 drives the positioning clamping piece 23 to be clamped into the inside of the positioning clamping groove 24, and under the clamping action of the positioning clamping piece 23 and the positioning clamping groove 24, the phenomenon of displacement of the PCB plate body 110 on the surface of the chain rack body 111 is avoided, so that the soldering effect of the chain plate conveying mechanism on the surface of the PCB plate body 110 is better, so as to realize the function of the chain plate conveying mechanism for positioning and preventing displacement of the PCB plate body 110.
[0024] Further, as shown in FIG. 6, Figure 2 and Figure 5As shown, the inside of the rack body 102 and the plate body 106 is provided with a rapid cooling mechanism 3, and the inside of the rapid cooling mechanism 3 contains a refrigeration box 31, a first air blower 32 and a rapid cooling assembly 33. The rapid cooling assembly 33 is arranged in the inside of the plate body 106 and the rack body 102, and is composed of a refrigeration device 331, a screen body 332 and a second air blower 333. The surface of the plate body 106 is mounted with the refrigeration box 31, and the inside of the refrigeration box 31 is mounted with the second air blower 333. The model of the second air blower 333 can be VFC series. The input end of the second air blower 333 is electrically connected with the output end of the control button 103, and penetrates through the refrigeration box 31 and extends to the outside of the refrigeration box 31. The inside of the refrigeration box 31 is mounted with the screen body 332 for filtering impurities in the air. The inside of the refrigeration box 31 is mounted with the refrigeration device 331 for refrigerating the air in the inside of the refrigeration box 31. The model of the refrigeration device 331 can be TC series. The input end of the refrigeration device 331 is electrically connected with the output end of the control button 103. The surface of the refrigeration box 31 is mounted with the first air blower 32. The model of the first air blower 32 can be VFC series. The input end of the first air blower 32 is electrically connected with the output end of the control button 103, and penetrates through the refrigeration box 31 and extends to the inside of the refrigeration box 31.
[0025] In implementation, the second air blower 333 in the inside of the refrigeration box 31 is controlled to work. Under the action of the second air blower 333, the external air is sucked into the inside of the refrigeration box 31, and the dust and other impurities in the air are filtered under the action of the screen body 332. Then, the user operates the control button 103 again, so that the control button 103 controls the refrigeration device 331 in the inside of the refrigeration box 31 to work. Under the action of the refrigeration device 331, the air in the inside of the refrigeration box 31 is refrigerated. Then, the user operates the control button 103 again, so that the control button 103 controls the first air blower 32 on the surface of the refrigeration box 31 to work. Under the action of the first air blower 32, the cold air in the inside of the refrigeration box 31 is introduced to the surface of the PCB plate body 110, so as to rapidly cool the surface of the PCB plate body 110, thereby realizing the function of rapidly cooling the surface of the PCB plate body 110 by the chain plate conveying mechanism.
[0026] Working principle: in use, first of all, the mechanism frame body 1 is placed in the designated position, the user places the PCB board body 110 to be soldered on the surface of the conveying belt 105, and the conveying belt 105 is supported under the action of the supporting frame 104, the user operates the control button 103 on the surface of the rack body 102, so that the control button 103 controls the work of the conveying belt 105, and the PCB board body 110 is conveyed under the action of the conveying belt 105, then the PCB board body 110 moves to the inside of the rack body 102, so that the PCB board body 110 moves to the surface of the chain frame body 111, and the PCB board body 110 is supported under the action of the chain frame body 111, then the user operates the control button 103 again, so that the control button 103 controls the work of the rotating motor 108 in the fixed frame 101, and the rotating motor 108 drives the rotating tooth disc 113 to rotate in the fixed frame 101, when the rotating tooth disc 113 rotates, the rotating tooth disc 113 drives the belt pulley 109 to rotate in the fixed frame 101, and the belt pulley 109 drives the chain frame body 111 to rotate on the inner wall of the fixed frame 101, so that the PCB board body 110 is conveyed under the action of the chain frame body 111 and moves to the inside of the rack body 102, and the surface of the PCB board body 110 is soldered.
[0027] Then, when the conveying belt 105 drives the PCB board body 110 to move to the surface of the chain frame body 111, the first magnet 21 on the surface of the chain frame body 111 moves to contact the surface of the second magnet 22 at the bottom of the PCB board body 110, and under the joint action of the first magnet 21 and the second magnet 22, the phenomenon of displacement of the PCB board body 110 on the surface of the chain frame body 111 is avoided, at this time, the chain frame body 111 drives the positioning clamp 23 to be clamped into the positioning clamping groove 24, and under the clamping action of the positioning clamp 23 and the positioning clamping groove 24, the phenomenon of displacement of the PCB board body 110 on the surface of the chain frame body 111 is avoided, so that the soldering effect of the chain plate conveying mechanism on the surface of the PCB board body 110 is better, so as to realize the function of positioning and preventing displacement of the chain plate conveying mechanism on the PCB board body 110, so that the chain plate conveying mechanism can position and place the PCB board body 110 on the surface of the conveying belt 105 when in use, avoiding the phenomenon of displacement of the chain plate conveying mechanism on the surface of the PCB board body 110 when soldering, so that the chain plate conveying mechanism is more convenient to operate when soldering.
[0028] Subsequently, when the chain plate conveying mechanism is soldering the surface of the PCB plate body 110, the temperature of the surface of the PCB plate body 110 is continuously increased, at this time, the user operates the control button 103, so that the control button 103 controls the second air blower 333 in the refrigeration box 31 to work, under the action of the second air blower 333, the external air is sucked into the inside of the refrigeration box 31, under the action of the screen body 332, the dust and other impurities in the air are filtered, then the user operates the control button 103 again, so that the control button 103 controls the refrigeration device 331 in the refrigeration box 31 to work, under the action of the refrigeration device 331, the air in the refrigeration box 31 is cooled, then the user operates the control button 103 again, so that the control button 103 controls the first air blower 32 on the surface of the refrigeration box 31 to work, under the action of the first air blower 32, the cold air in the refrigeration box 31 is introduced to the surface of the PCB plate body 110, the surface of the PCB plate body 110 is rapidly cooled to realize the function of rapidly cooling the surface of the PCB plate body 110 by the chain plate conveying mechanism, so that the chain plate conveying mechanism can avoid the phenomenon that the PCB plate cannot be cooled in time after soldering when in use, avoid the phenomenon that the brightness of the solder joint on the surface of the PCB plate body 110 is not high, and the phenomenon that the PCB plate body 110 is easy to break and peel, improve the quality of soldering on the surface of the PCB plate body 110, make the soldering effect of the chain plate conveying mechanism on the surface of the PCB plate body 110 better, and finally complete the use of the chain plate conveying mechanism.
[0029] It will be apparent to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Accordingly, no matter from which point of view, the embodiments should be considered as exemplary and not restrictive, and the scope of the present application is defined by the appended claims and not by the above description, and therefore all changes falling within the meaning and range of equivalency of the essential elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.
Claims
1. A chain board conveying mechanism for soldering PCB board, comprising a mechanism frame (1), characterized in that: The surface of the mechanism frame body (1) is provided with a rack body (102), the surface of the rack body (102) is provided with a control button (103), the inner wall of the mechanism frame body (1) is provided with a plate body (106), the inside of the rack body (102) is provided with a support frame (104), one end of the support frame (104) extends to the outside of the rack body (102), the inside of the rack body (102) is provided with a fixing frame (101), the surface of the support frame (104) is provided with a conveying belt (105), the surface of the conveying belt (105) is placed with a PCB board body (110), the inside of the fixing frame (101) is provided with a rotating tooth disc (113), the rotating tooth disc (113) and the inner wall of the fixing frame (101) are rotatably connected, the surface of the rotating tooth disc (113) is provided with a belt pulley (109), the surface of the belt pulley (109) is provided with equidistant chain frame bodies (111), the chain frame bodies (111) and the inner wall of the fixing frame (101) are slidably connected, the surface of the chain frame bodies (111) and the PCB board body (110) are provided with a positioning anti-displacement mechanism (2), the inside of the positioning anti-displacement mechanism (2) comprises a first magnet (21), a second magnet (22), a positioning clamping piece (23) and a positioning clamping groove (24), the inside of the rack body (102) and the plate body (106) is provided with a rapid cooling mechanism (3), the inside of the rapid cooling mechanism (3) comprises a refrigeration box (31), a first air blower (32) and a rapid cooling assembly (33).
2. The chain board conveying mechanism for PCB soldering according to claim 1, characterized in that: One end of the fixing frame (101) extends to the outside of the rack body (102), the surface of the fixing frame (101) is provided with a mounting frame (107), the surface of the mounting frame (107) is fastened with the surface of the plate body (106) and the fixing frame (101) by screws, the inside of the fixing frame (101) is provided with a rotating motor (108), the input end of the rotating motor (108) is electrically connected with the output end of the control button (103), the output end of the rotating motor (108) is provided with a rotating shaft through a shaft coupling, and one end of the rotating shaft is fixed with the surface of the center position of the rotating tooth disc (113), the surface of the rotating tooth disc (113) is in contact with the surface of the bottom position of the PCB board body (110), the surface of the mechanism frame body (1) is provided with a transparent observation window (112).
3. The chain conveyor for PCB soldering according to claim 1, wherein: The surface of the chain frame body (111) is provided with a first magnet (21), the surface of the bottom position of the PCB board body (110) is provided with a second magnet (22) for positioning the PCB board body (110), and the surface of the second magnet (22) and the first magnet (21) are magnetically attracted to each other.
4. The chain conveyor for PCB soldering according to claim 1, wherein: The inner wall of the chain rack body (111) is provided with a positioning clamp (23) for preventing displacement of the PCB body (110), the surface of the bottom of the PCB body (110) is provided with a positioning clamping groove (24), and the positioning clamping groove (24) and the surface of the positioning clamp (23) are matched with each other.
5. The chain conveyor for PCB soldering as claimed in claim 1, wherein: The rapid cooling assembly (33) is arranged in the interior of the rack body (102) and the plate body (106), the rapid cooling assembly (33) is composed of a refrigerating device (331), a screen body (332) and a second air blower (333), the surface of the plate body (106) is provided with a refrigerating box (31), the interior of the refrigerating box (31) is provided with the second air blower (333), the input end of the second air blower (333) is electrically connected with the output end of the control button (103), the input end of the second air blower (333) penetrates through the refrigerating box (31) and extends to the outside of the refrigerating box (31), and the interior of the refrigerating box (31) is provided with the screen body (332) for filtering impurities in air.
6. The chain conveyor for PCB soldering according to claim 5, wherein: The interior of the refrigerating box (31) is provided with the refrigerating device (331) for refrigerating air in the refrigerating box (31), the input end of the refrigerating device (331) is electrically connected with the output end of the control button (103), the surface of the refrigerating box (31) is provided with the first air blower (32), the input end of the first air blower (32) is electrically connected with the output end of the control button (103), and the input end of the first air blower (32) penetrates through the refrigerating box (31) and extends to the interior of the refrigerating box (31).