Drying box for manufacturing printed circuit board

Abstract

The utility model discloses a drying box for manufacturing a printed circuit board, which comprises a drying box body, a door body and a heat shield, the drying box body is provided with an opening for a cart to go in and out, the heat shield is arranged on the opening to shield the upper part of the opening, and the height of the heat shield can be adjusted. According to the drying box for manufacturing the printed circuit board, the height of the heat shield can be adjusted according to the overall height of the cart and the printed circuit board to be dried, so that the cart with the printed circuit board can be smoothly pushed into and out of the drying box, and the drying efficiency is improved. The heat shield is arranged in the drying space, and the opening part of the drying space above the highest point of the printed circuit board on the cart is blocked to the greatest extent, so that the loss of heat in the drying space can be reduced to the greatest extent in the pushing-in and pushing-out process of the cart, when printed circuit boards of different specifications are replaced for drying, only the height of the heat shield needs to be adjusted, and the operation is very convenient. Therefore, the drying box can efficiently dry the printed circuit boards of different specifications.

Description

Technical Field

[0001] The utility model relates to the field of printed circuit board manufacturing, in particular to a drying box for printed circuit board manufacturing. Background Art

[0002] The drying process is an important part of the printed circuit board manufacturing process. By setting the appropriate temperature and time, it can effectively remove moisture and internal stress in the printed circuit board, improve the warping of the printed circuit board, enhance the welding effect of the printed circuit board, prevent problems such as bursting and delamination caused by moisture, and prevent oxidation on the printed circuit board, thereby improving product quality and ensuring the reliability and stability of electronic equipment.

[0003] The existing method for drying printed circuit boards is to place the printed circuit boards in a drying box for drying. The specifications of the drying boxes used by printed circuit board manufacturers are usually the same. Some printed circuit boards are larger in size, while others are smaller in size. This will result in that when a cart places the smaller printed circuit boards to be dried in the drying box, the printed circuit boards and the cart only occupy a small part of the lower drying space in the drying box in the vertical direction, while the upper space of the drying space is open to the outside every time the cart with the smaller printed circuit boards is pushed in and out, resulting in serious heat loss in the drying space, which not only affects the drying efficiency of the printed circuit boards but also wastes electricity.

[0004] In addition, the locking mechanism structure on some drying box doors is relatively complex, which increases the overall cost of the drying box, and is cumbersome to operate, which is not conducive to quick operation by operators.

[0005] In view of the above problems, it is very necessary to research and design a drying box whose door locking mechanism has a simple structure, is easy to operate, and can adjust the size of the opening of the drying space to the outside according to printed circuit boards of different specifications. Utility Model Content

[0006] The purpose of the utility model is to provide a drying box for manufacturing printed circuit boards to solve the above technical problems.

[0007] According to one aspect of the utility model, there is provided a drying box for printed circuit board manufacturing, comprising:

[0008] The drying box body is provided with an opening for the trolley to enter and exit;

[0009] A door body hinged on the drying box body to open or close the opening; and

[0010] A heat shield is arranged on the opening to cover the upper part of the opening, and the height of the heat shield can be adjusted.

[0011] The utility model provides a drying box for manufacturing printed circuit boards. After the door body opens the opening of the drying box body, the cart with the printed circuit boards placed thereon is pushed into the drying box body to dry the printed circuit boards. The height of the heat shield can be adjusted according to the size of the printed circuit boards placed on the cart, that is, the overall height of the cart and the printed circuit boards to be dried, so as to ensure that the cart with the printed circuit boards placed thereon can be smoothly pushed in and out of the drying box, and the opening portion of the drying space above the highest point of the printed circuit boards on the cart is blocked to the greatest extent. In this way, the heat loss in the drying space can be reduced to the greatest extent during the process of pushing the cart in and out. When replacing printed circuit boards of different specifications for drying, the height of the heat shield can be adjusted, which is very convenient, so that the drying box can efficiently dry printed circuit boards of different specifications.

[0012] Preferably, it also includes a fixing screw, and both sides of the opening are respectively provided with a concave first slot, the inner bottom of the first slot is provided with a plurality of longitudinally arranged threaded holes, the top of the opening is provided with a concave second slot, the top of the heat shield is inserted in the second slot, the two sides of the heat shield are respectively inserted in the first slots on both sides of the opening, and the two ends of the bottom of the heat shield are respectively provided with fixing plates, and the fixing plates are provided with through holes, and the ends of the fixing screws pass through the through holes on the fixing plates and are screwed into the threaded holes in the first slots.

[0013] Therefore, after removing the fixing screws, the two sides of the heat shield can move up and down in the first slots on both sides of the opening, and the top of the heat shield can move up and down in the second slot. When the height of the heat shield needs to be adjusted, the fixing screws on the fixing plates on both sides of the bottom of the heat shield are removed, and then the heat shield is moved up and down. When the height position of the heat shield is adjusted, the ends of the fixing screws are passed through the through holes on the fixing plates at the bottom of the heat shield and then screwed into the corresponding threaded holes in the first slots. The height adjustment of the heat shield is very convenient and quick.

[0014] Preferably, two parallel guide grooves are provided on the inner bottom of the drying box body, and the ends of the guide grooves located at the openings are provided with slopes, so that the casters of the cart carrying the printed circuit board can roll into the guide grooves through the slopes.

[0015] Therefore, the casters of the cart with the printed circuit board placed on it are aligned with the slope, and the casters of the cart can be easily rolled directly through the slope into the guide groove inside the drying box body. There is no need to move the cart into the drying box body, and the pushing and pushing of the cart are very convenient. Moreover, the existence of the guide groove can ensure that the cart is accurately placed in the drying box body, avoiding the printed circuit board from hitting the inner wall of the drying box body during the pushing and pushing process, thereby damaging the printed circuit board.

[0016] Preferably, the guide groove is arranged perpendicular to the plane where the opening is located.

[0017] Therefore, in this case, it is ensured that the cart does not hit the inner wall of the drying box body every time it is pushed in and out.

[0018] Preferably, the door body is provided with a handle, a connecting rod and two tongue parts, and the drying box body is provided with two clamping parts. The connecting rod is longitudinally arranged on the door body and can rotate on the door body. The two tongue parts are respectively arranged at both ends of the connecting rod. The two clamping parts are respectively located above and below the door body.

[0019] The handle portion can drive the connecting rod to rotate, and when the connecting rod rotates, the inserting tongue portion can be inserted and fixed in the clamping portion.

[0020] Therefore, the operator pulls the handle, the connecting rod rotates, and the connecting rod drives the inserting tongues at the upper and lower ends to be inserted and fixed in the clamping part or separated from the clamping part to realize the locking, closing and opening of the door body. The operation is very convenient, and the locking mechanism of the door body, namely the connecting rod, the inserting tongue and the clamping part, has a simple structure, which can reduce the overall cost of the drying box.

[0021] Preferably, the handle portion includes a wrench, a connecting rod and a rotating portion, one end of the wrench is hinged on the door body, one end of the connecting rod is hinged at the middle position of the wrench, the other end of the connecting rod is fixed on the rotating portion, the rotating portion is sleeved on the connecting rod, and the rotating portion can drive the connecting rod to rotate.

[0022] Therefore, when the free end of the wrench is pulled, the wrench rotates on the door body, and the wrench can drive the rotating part to rotate through the connecting rod. The rotating part can drive the connecting rod to rotate synchronously, and the connecting rod can drive the inserting tongue parts at the upper and lower ends to be inserted and fixed in the clamping part or separated from the clamping part to realize the locking, closing and opening of the door body, which is very convenient to operate.

[0023] Preferably, the cross section of the connecting rod at the matching position with the rotating part is square, the rotating part is provided with a square through hole, and the connecting rod is inserted into the square through hole.

[0024] Therefore, by matching the square through hole on the rotating part with the square cross-section of the connecting rod, it can be achieved that when the rotating part rotates, the connecting rod is driven to rotate synchronously.

[0025] Preferably, the clamping portion includes a first C-shaped plate, a second C-shaped plate and a fixing bolt, the openings of the first C-shaped plate and the second C-shaped plate are opposite and plugged together, the fixing bolt fixes the first C-shaped plate and the second C-shaped plate together, the first C-shaped plate is arranged on the drying box body, and the tongue portion is provided with a tongue.

[0026] When the connecting rod rotates, the inserting tongue on the inserting tongue portion can be inserted into the second C-shaped plate from the side of the second C-shaped plate.

[0027] Therefore, when the connecting rod rotates, the tongue on the tongue portion can be inserted into the second C-shaped plate and the tongue abuts against the longitudinal portion of the second C-shaped plate to achieve the locking operation of the door body; when the connecting rod rotates, the tongue on the tongue portion can be rotatably disengaged from the second C-shaped plate to achieve the opening operation of the door body.

[0028] Preferably, the first C-shaped plate is provided with a first oblong through hole, the second C-shaped plate is provided with a second oblong through hole, and the fixing bolt passes through the first oblong through hole and the second oblong through hole to fix the first C-shaped plate and the second C-shaped plate together.

[0029] Therefore, after loosening the fixing bolts, the existence of the first oblong through hole and the second oblong through hole can adjust the depth of the first C-shaped plate and the second C-shaped plate plugged together. When the depth of the first C-shaped plate and the second C-shaped plate plugged together is adjusted, the fixing bolts can be tightened. In this way, when the door body is in a closed state, the distance between the tongue on the tongue part and the drying box body can be adjusted, thereby adjusting the sealing degree of the door body to ensure that the door body can be sealed on the drying box body.

[0030] Preferably, the upper and lower parts of the door body are respectively provided with supporting plates, the cross-sections of the upper and lower ends of the connecting rod are both circular, the upper end of the connecting rod is inserted into the upper supporting plate on the door body and can rotate in the supporting plate, and the lower end of the connecting rod is inserted into the lower supporting plate on the door body and can rotate in the supporting plate.

[0031] Therefore, the upper and lower ends of the connecting rod with circular cross-sections can rotate smoothly on the bearing plate, ensuring that the inserting tongue on the inserting tongue portion can be smoothly inserted into and removed from the second C-shaped plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of a drying box for printed circuit board manufacturing according to one embodiment of the utility model;

[0033] Figure 2 for Figure 1 The schematic diagram of the structure of the drying box for printed circuit board manufacturing with the door hidden behind it is shown;

[0034] Figure 3 for Figure 2 The enlarged structural schematic diagram of the drying box for printed circuit board manufacturing shown in FIG.

[0035] Figure 4 for Figure 2 The schematic diagram of the structure of the drying box for printed circuit board manufacturing shown in FIG.

[0036] Figure 5 for Figure 4A side view of a drying oven for printed circuit board manufacturing is shown;

[0037] Figure 6 for Figure 1 A side view of a handle portion of a drying box for printed circuit board manufacturing shown in FIG.

[0038] Figure 7 for Figure 6 The enlarged structural diagram of the B position in the drying box for printed circuit board manufacturing shown in FIG.

[0039] Figure 8 for Figure 6 The enlarged structural schematic diagram of point C in the drying box for printed circuit board manufacturing is shown. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0041] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first", "second" and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, unless otherwise specified, "multiple" means two or more; it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the two elements.

[0042] Figures 1 to 8 The structure of a drying box for manufacturing printed circuit boards according to an embodiment of the utility model is schematically shown.

[0043] See also Figures 1 to 8 A drying box for manufacturing printed circuit boards comprises a drying box body 1, a door body 2, a heat shield 3 and a fixing screw 4.

[0044] See also Figure 2 and Figure 3The drying box body 1 is provided with an opening 11 for a cart to enter and exit. The printed circuit boards can be dried by pushing the cart with the printed circuit boards into the drying box body 1.

[0045] See also Figure 2 The heat shield 3 is installed on the opening 11, and the heat shield 3 is used to cover the upper part of the opening 11 to prevent heat loss. The height of the heat shield 3 can be adjusted. According to the size of the printed circuit board placed on the cart, that is, the overall height of the cart and the printed circuit board to be dried, the height of the heat shield 3 can be adjusted, which not only ensures that the cart with the printed circuit board can be smoothly pushed in and out of the drying box, but also blocks the opening 11 part of the drying space above the highest point of the printed circuit board on the cart to the greatest extent. In this way, the cart can minimize the heat loss in the drying space of the drying box body 1 during the process of pushing in and out. When replacing printed circuit boards of different specifications for drying, it is only necessary to adjust the height of the heat shield 3, which is very convenient, so that the drying box can efficiently dry printed circuit boards of different specifications.

[0046] The specific installation structure of the heat shield 3 is as follows: Figures 2 to 4 The opening 11 is formed with a first concave slot 12 on both sides, the first slot 12 is located at the upper part of the opening 11, the lower end of the first slot 12 is located at the middle position of the opening 11 in the longitudinal direction, and the inner bottom of the first slot 12 is formed with a plurality of longitudinally arranged threaded holes 121 ( Figure 3 The number and spacing of the threaded holes 121 can be adjusted and set according to the height adjustment requirements of the heat shield 3, see Figure 5 , a concave second slot 13 is formed at the top of the opening 11, the area at the top of the opening 11 can be formed by two heat insulation board bodies arranged in parallel, the space between the two heat insulation board bodies forms the second slot 13, the thickness of the heat shield 3 is slightly smaller than the width of the second slot 13, ensuring that the heat shield 3 can be inserted into the second slot 13, the thickness of the heat shield 3 is slightly smaller than the width of the first slot 12, ensuring that both ends of the heat shield 3 can be inserted into the first slot 12, the top of the heat shield 3 is plugged into the second slot 13, the two sides of the heat shield 3 are respectively plugged into the first slots 12 on both sides of the opening 11, the two sides of the heat shield 3 can move up and down in the first slots 12 on both sides of the opening 11, and the top of the heat shield 3 can move up and down in the second slot 13 at the top of the opening 11, refer to Figure 3The two ends of the bottom of the heat shield 3 are respectively formed with fixing plates 31, the width of the fixing plates 31 is slightly smaller than the width of the first slot 12, the fixing plates 31 are accommodated in the first slot 12, and the fixing plates 31 are formed with through holes (not shown), the number of the fixing screws 4 is two, the ends of the two fixing screws 4 respectively pass through the through holes on the two fixing plates 31 at the bottom of the heat shield 3 and are screwed into the threaded holes 121 in the first slot 12, after the fixing screws 4 are removed, the two sides of the heat shield 3 can move up and down in the first slots 12 on both sides of the opening 11, and the top of the heat shield 3 can move up and down in the second slot 13 When the height of the heat shield 3 needs to be adjusted, the fixing screws 4 on the fixing plates 31 on both sides of the bottom of the heat shield 3 are removed, and then the heat shield 3 is moved up and down. When the height position of the heat shield 3 is adjusted, the ends of the fixing screws 4 are passed through the through holes on the fixing plates 31 at the bottom of the heat shield 3 and are screwed into the corresponding threaded holes 121 in the first slot 12. The height adjustment of the heat shield 3 is very convenient and quick. The height setting of the lowest threaded hole 121 in the first slot 12 ensures that when the heat shield 3 is fixed in the lowest threaded hole 121 by the fixing screws 4, the top of the heat shield 3 is still inserted in the second slot 13.

[0047] See also Figure 2 and Figure 4 Two parallel guide grooves 14 are formed on the inside of the drying box body 1. The width of the guide groove 14 is greater than the width of the casters of the cart for carrying the printed circuit board to be printed. The end of the guide groove 14 located at the opening 11 is provided with a slope 141. The casters of the cart carrying the printed circuit board can roll into the guide groove 14 through the slope 141. The casters of the cart with the printed circuit board are aligned with the slope 141. The casters of the cart can be easily rolled into the guide groove 14 inside the drying box body 1 directly through the slope 141. There is no need to move the cart into the drying box body 1. The pushing and pushing of the cart are very convenient. Moreover, the existence of the guide groove 14 can ensure that the cart is accurately placed in the drying box body 1, avoiding the printed circuit board from hitting the inner wall of the drying box body 1 during the pushing and pushing process of the cart, thereby damaging the printed circuit board.

[0048] See also Figure 2 The guide groove 14 is arranged perpendicular to the plane where the opening 11 is located, so that it is ensured that the cart will not hit the inner wall of the drying box body 1 every time it is pushed in and out.

[0049] The door 2 is hinged on the drying box body 1 to open or close the opening 11, see Figure 1 and Figure 6In this embodiment, the number of door bodies 2 is two, forming a double-door style, one side of each door body 2 is installed on the drying box body 1 through three hinge structures, and the two door bodies 2 can open or close the opening 11 together, and the structure and installation method of the two door bodies 2 are the same. In other embodiments, the number of door bodies 1 can also be one, forming a single-door style.

[0050] The structures and installation methods of the two door bodies 2 are the same, and the structure and installation method of one of the door bodies 2 is taken as an example for description. Figures 6 to 8 The door body 2 is provided with a handle 21, a connecting rod 22 and two tongue portions 23, see Figure 7 The handle portion 21 includes a wrench 211, a linkage rod 212, a rotating portion 213 and a mounting member 214; see Figure 7 , the mounting piece 214 is fixed on the door body 2, the right end of the wrench 211 is hinged on the mounting piece 214 on the door body 2, a raised hinge portion 2111 is formed at the middle position of the wrench 211, the number of the connecting rods 212 is two, one end of the two connecting rods 212 is hinged on the hinge portion 2111 through a rotating shaft, the other ends of the two connecting rods 212 are fixed on the side of the rotating portion 213, the rotating portion 213 is sleeved on the connecting rod 22, the rotating portion 213 can drive the connecting rod 22 to rotate, the connecting rod 22 is longitudinally mounted on the door body 2 and can rotate on the door body 2, when the free end of the wrench 211 is pulled, the wrench 211 rotates on the door body 2, the wrench 211 can drive the rotating portion 213 to rotate through the two connecting rods 212, and the rotating rotating portion 213 can drive the connecting rod 22 to rotate synchronously; refer to Figure 7 The cross section of the connecting rod 22 at the position where it cooperates with the rotating part 213 is square, and a square through hole 2131 is formed on the rotating part 213. The connecting rod 22 is inserted into the square through hole 2131. The square through hole 2131 on the rotating part 213 cooperates with the position where the cross section of the connecting rod 22 is square, so that when the rotating part 213 rotates, the connecting rod 22 can be driven to rotate synchronously; see Figure 6 and Figure 8 The upper and lower parts of the door body 2 are respectively provided with bearing plates 24. The cross section of a section of the upper end of the connecting rod 22 is circular, and the cross section of a section of the lower end of the connecting rod 22 is circular. The upper end of the connecting rod 22 is inserted into the upper bearing plate 24 on the door body 2 and can rotate freely in the bearing plate 24. The lower end of the connecting rod 22 is inserted into the lower bearing plate 24 on the door body 2 and can rotate freely in the bearing plate 24. Figure 7 The middle part of the connecting rod 22 is also mounted on the door body 2 through two components with the same structure as the bearing plate 24, and the rotating part 213 is located between the two components with the same structure as the bearing plate 24; Figure 1 , Figure 6 and Figure 8The two tongue portions 23 are respectively fixed at the upper and lower ends of the connecting rod 22, and the connecting rod 22 can drive the tongue portions 23 at both ends to rotate synchronously; Figure 2 and Figure 4 Two clamping parts 15 are installed on the drying box body 1. The two clamping parts 15 are respectively located above and below the door body 2. When the connecting rod 22 rotates, the connecting rod 22 can drive the tongue parts 23 at the upper and lower ends to be inserted and fixed in the clamping parts 15 or separated from the clamping parts 15 to realize the locking, closing and opening of the door body 2; refer to Figure 8 The clamping portion 15 includes a first C-shaped plate 151, a second C-shaped plate 152 and a fixing bolt 153. The first C-shaped plate 151 is fixed to the drying box body 1. The openings of the first C-shaped plate 151 and the second C-shaped plate 152 are opposite and plugged together. The fixing bolt 153 fixes the transverse portion of the first C-shaped plate 151 and the transverse portion of the second C-shaped plate 152 together. The tongue portion 23 is formed with a tongue 231. When the connecting rod 22 rotates, the tongue 231 on the tongue portion 23 can be plugged into the second C-shaped plate 152 from the side of the second C-shaped plate 152 and abut against the longitudinal portion of the second C-shaped plate 152 ( Figure 7 When the connecting rod 22 rotates in the opposite direction, the tongue 231 on the tongue portion 23 can be disengaged from the side of the second C-shaped plate 152, that is, the tongue 231 on the tongue portion 23 can be rotatably disengaged from the second C-shaped plate 152, thereby realizing the opening operation of the door body 2; see Figure 7 and Figure 8 When the free end of the wrench 211 is pulled, the wrench 211 rotates on the door body 2, and the wrench 211 drives the rotating part 213 to rotate through the two connecting rods 212. The rotating rotating part 213 can drive the connecting rod 22 to rotate synchronously, and the connecting rod 22 can drive the inserting tongues 231 on the inserting tongue parts 23 at the upper and lower ends to be inserted into the second C-shaped plate 152 from the side of the second C-shaped plate 152 and abut against the longitudinal part of the second C-shaped plate 152 or rotate out of the second C-shaped plate 152, thereby realizing the locking, closing and opening of the door body 2, and the operation is very convenient.

[0051] See also Figure 8Two first oblong through holes 1511 are formed on the two parallel transverse parts of the first C-shaped plate 151, and two second oblong through holes 1521 are formed on the two parallel transverse parts of the second C-shaped plate 152. After the fixing bolts 153 pass through the first oblong through holes 1511 and the second oblong through holes 1521, the first C-shaped plate 151 and the second C-shaped plate 152 can be fixed together. The upper transverse part of the first C-shaped plate 151 and the upper transverse part of the second C-shaped plate 152 are fixed together by two fixing bolts 153. The lower transverse part of the first C-shaped plate 151 and the lower transverse part of the second C-shaped plate 152 are fixed together by two fixing bolts 153. The transverse portion is also fixed together by two fixing bolts 153. After loosening the fixing bolts 153, due to the existence of the first oblong through hole 1511 and the second oblong through hole 1521, the depth of the first C-shaped plate 151 and the second C-shaped plate 152 plugged together can be adjusted. When the depth of the first C-shaped plate 151 and the second C-shaped plate 152 plugged together is adjusted, the fixing bolts 153 can be tightened. In this way, when the door body 2 is in a closed state, the distance between the tongue 231 on the tongue portion 23 and the drying box body 1 can be adjusted, so that the sealing degree of the door body 2 can be adjusted to ensure that the door body 2 can be sealed on the drying box body 1.

[0052] See also Figures 1 to 8, the utility model of the drying box for manufacturing printed circuit boards, after pulling the free end of the wrench 211 on the door body 2 to open the opening 11 of the drying box body 1, the casters of the cart with the printed circuit boards placed on it are aligned with the slope 141, and the casters of the cart directly roll through the slope 141 to the guide groove 14 inside the drying box body 1, so that the cart with the printed circuit boards placed on it is pushed into the drying box body 1, and then the door body 2 is closed and the free end of the wrench 211 is pressed to lock the door body 2, and the drying system inside the drying box body 1 can dry the printed circuit boards; according to the size of the printed circuit boards placed on the cart, that is, the overall height of the cart and the printed circuit boards to be dried, the height of the heat shield 3 can be adjusted to ensure that the cart with the printed circuit boards placed on it can be smoothly pushed into and out of the drying box, and the opening 11 of the drying space above the highest point of the printed circuit boards on the cart can be partially blocked to the greatest extent, which In this way, the heat loss in the drying space can be minimized during the pushing and pushing of the cart. When replacing printed circuit boards of different specifications for drying, the fixing screws 4 on the fixing plates 31 on both sides of the bottom of the heat shield 3 are removed, and then the heat shield 3 is moved up and down. When the height position of the heat shield 3 is adjusted, the ends of the fixing screws 4 are passed through the through holes on the fixing plates 31 at the bottom of the heat shield 3 and are screwed into the corresponding threaded holes 121 in the first slots 12 on both sides of the opening 11. The height adjustment of the heat shield 3 is very convenient, so that the drying box can efficiently dry printed circuit boards of different specifications. In addition, the operator can open and lock the door body 2 by turning the wrench 211 on the handle portion 21, which is very convenient to operate. Moreover, the locking mechanism of the door body 2, i.e., the connecting rod 22, the tongue portion 23, and the clamping portion 15, has a simple structure, which can reduce the overall cost of the drying box.

[0053] The above are only some embodiments of the present invention, which are intended to illustrate the technical means of the present invention, but not to limit the technical scope of the present invention. Those skilled in the art can make obvious improvements to the present invention in combination with existing common knowledge, which all fall within the protection scope of the present invention.

Claims

1. A drying oven for printed circuit board manufacturing, characterized in that: include: A drying box body, wherein the drying box body is provided with an opening for a cart to enter and exit; A door body, the door body being hinged on the drying box body to open or close the opening; and A heat shield is arranged on the opening to cover the upper part of the opening, and the height of the heat shield can be adjusted.

2. The drying box for printed circuit board manufacturing according to claim 1, characterized in that: It also includes a fixing screw, wherein both sides of the opening are respectively provided with a first concave slot, the inner bottom of the first slot is provided with a plurality of longitudinally arranged threaded holes, the top of the opening is provided with a second concave slot, the top of the heat shield is inserted into the second slot, the two sides of the heat shield are respectively inserted into the first slots on both sides of the opening, the two ends of the bottom of the heat shield are respectively provided with fixing plates, the fixing plates are provided with through holes, and the ends of the fixing screws pass through the through holes on the fixing plates and are screwed into the threaded holes in the first slots.

3. The drying box for printed circuit board manufacturing according to claim 1, characterized in that: The inner bottom of the drying box body is provided with two parallel guide grooves, and the ends of the guide grooves located at the openings are provided with slopes, and the casters of the cart carrying the printed circuit board can roll into the guide grooves through the slopes.

4. The drying box for printed circuit board manufacturing according to claim 3, characterized in that: The guide groove is arranged perpendicularly to the plane where the opening is located.

5. The drying oven for printed wiring board manufacturing according to any one of claims 1 to 4, characterized in that: The door body is provided with a handle, a connecting rod and two tongue parts, and the drying box body is provided with two clamping parts. The connecting rod is longitudinally arranged on the door body and can rotate on the door body. The two tongue parts are respectively arranged at both ends of the connecting rod. The two clamping parts are respectively located above and below the door body. The handle portion can drive the connecting rod to rotate, and when the connecting rod rotates, the inserting tongue portion can be inserted and fixed in the clamping portion.

6. The drying box for printed circuit board manufacturing according to claim 5, characterized in that: The handle portion includes a wrench, a connecting rod and a rotating portion, one end of the wrench is hinged on the door body, one end of the connecting rod is hinged at the middle position of the wrench, the other end of the connecting rod is fixed on the rotating portion, the rotating portion is sleeved on the connecting rod, and the rotating portion can drive the connecting rod to rotate.

7. The drying box for printed circuit board manufacturing according to claim 6, characterized in that: The cross section of the connecting rod at the matching position with the rotating part is square, the rotating part is provided with a square through hole, and the connecting rod is inserted into the square through hole.

8. The drying box for printed circuit board manufacturing according to claim 5, characterized in that: The clamping part includes a first C-shaped plate, a second C-shaped plate and a fixing bolt. The openings of the first C-shaped plate and the second C-shaped plate are opposite and plugged together. The fixing bolt fixes the first C-shaped plate and the second C-shaped plate together. The first C-shaped plate is arranged on the drying box body. The tongue portion is provided with a tongue. When the connecting rod rotates, the inserting tongue on the inserting tongue portion can be inserted into the second C-shaped plate from the side of the second C-shaped plate.

9. The drying box for printed circuit board manufacturing according to claim 8, characterized in that: The first C-shaped plate is provided with a first oblong through hole, the second C-shaped plate is provided with a second oblong through hole, and the fixing bolt passes through the first oblong through hole and the second oblong through hole to fix the first C-shaped plate and the second C-shaped plate together.

10. The drying box for printed circuit board manufacturing according to claim 5, characterized in that: The upper and lower parts of the door body are respectively provided with supporting plates, and the cross-sections of the upper and lower ends of the connecting rod are both circular. The upper end of the connecting rod is inserted into the upper supporting plate on the door body and can rotate in the supporting plate, and the lower end of the connecting rod is inserted into the lower supporting plate on the door body and can rotate in the supporting plate.

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