Plastic backrest injection mold for baby stroller

Abstract

The present application discloses a plastic backrest injection mold for a baby stroller, which belongs to the technical field of baby stroller production, and comprises a main body module and a self-locking elastic module. The main body module comprises a lower mold base, the bottom of which is fixedly connected to a base frame, the top of which is fixedly connected to a support frame, and the top of the support frame is provided with a sealing mold component. The self-locking elastic module comprises a lifting groove starting at the bottom of the inner wall of the lower mold base, and the setting of a lifting plate, an elastic self-locking component, a lifting component, an unlocking component and a driving component allows the mold to gradually increase the lifting force on the backrest model when lifting the backrest model, thereby avoiding damage to the model caused by a large lifting force. At the same time, when the model falls off from the inner wall of the lower mold base, the elastic self-locking component can be automatically locked to avoid damage to the backrest model caused by the elastic force pushing the model to bounce up, thereby making the mold more stable when used.

Description

Technical Field

[0001] The present application relates to the technical field of baby stroller production, and more specifically, to a plastic backrest injection mold for a baby stroller. Background Art

[0002] In addition to being the baby's favorite means of transportation for walking, baby strollers are also a must-have for mothers when they take their babies shopping. However, according to the baby's growth and usage, baby strollers can be divided into many types, including easy-to-carry strollers and spacious and comfortable strollers, etc. The backrest of most strollers needs to be injection molded by injection molds.

[0003] According to the search, the Chinese patent with the patent number CN220517452U discloses an injection mold for facilitating the removal of injection molded parts, including a frame, a support frame welded on the frame, a lower mold welded on the support frame, an upper mold in contact with the lower mold, a discharge mechanism provided on the lower mold, an exhaust mechanism provided in the upper mold, a cylinder fixedly mounted on the frame, a cylinder rod of the cylinder and the frame are slidably connected, a connecting sleeve is slidably connected to the outer side of the cylinder rod, and the connecting sleeve is welded to the upper mold. By setting structures such as connecting rods, connecting plates, ejector rods, ejector plates, retaining rings, springs, etc., the upper mold is moved to drive the connecting rod to move, so that the connecting plate pushes up the ejector rod through the spring, and then the ejector plate automatically ejects the injection molded part, making ejection more convenient and more powerful.

[0004] With respect to the above-mentioned related technologies, the applicant believes that, during the use of the above-mentioned injection mold, although the ejector pin can be lifted up by a spring, thereby enabling the ejection plate to automatically eject the injection molded part, making ejection more convenient, in the process of lifting the model, the spring gradually contracts to increase the force of lifting the model, thereby avoiding direct lifting force that may damage the model. However, at the moment when the model falls off the inner wall of the mold, the spring will quickly open and easily bounce the model and then drop it. In this state, the model is easily damaged. For this reason, we propose a plastic backrest injection mold for a baby stroller. Summary of the invention

[0005] In order to solve the above problems, the present application provides a plastic backrest injection mold for a baby stroller, which adopts the following technical solution:

[0006] A plastic backrest injection mold for a baby stroller, comprising a main body module and a self-locking elastic module, the main body module comprising a lower mold base, the bottom of the lower mold base is fixedly connected to a base frame, the top of the lower mold base is fixedly connected to a support frame, the top of the support frame is provided with a sealing mold assembly, the self-locking elastic module comprises a jacking groove starting at the bottom of the inner wall of the lower mold base, the inside of the jacking groove is movably connected to a jacking plate, the bottom of the jacking plate is fixedly connected to a hollow sleeve plate, the bottom of the hollow sleeve plate extends to the inside of the base frame, the An elastic self-locking component is arranged inside the hollow sleeve plate, a lifting component is arranged between the two sides of the inner wall of the base frame, an unlocking component is arranged on the front end surface of the lower die seat, the unlocking component is connected to the elastic self-locking component, a driving component is fixedly connected to one side of the base frame, a cooling component is arranged inside the lower die seat, the cooling component is connected to the driving component, the lifting component is connected to the elastic self-locking component, the elastic self-locking component includes a lifting block movably connected to the inner wall of the hollow sleeve plate, and the bottom of the lifting block extends to the hollow sleeve plate The outside of the lifting block, a plurality of lifting springs are fixedly connected between the top of the lifting block and the top of the inner wall of the hollow sleeve, the inside of the lifting block is provided with two slide grooves, the insides of the two slide grooves are slidably connected with right-angled trapezoidal locking blocks, the opposite ends of the two right-angled trapezoidal locking blocks extend to the outside of the lifting block, the other ends of the two right-angled trapezoidal locking blocks are interactively connected with contraction springs between the inner walls of the two slide grooves, ratchet grooves respectively adapted to the two right-angled trapezoidal locking blocks are provided on both sides of the inner wall of the hollow sleeve, and the elastic self-locking The component also includes a cylindrical groove opened inside the lifting block and located between the two sliding grooves, a central rotating rod is rotatably connected between the top and bottom of the inner wall of the cylindrical groove, the bottom end of the central rotating rod extends to the bottom of the lifting block, a torsion spring is fixedly connected between the outer surface of the central rotating rod near the top and the top of the inner wall of the cylindrical groove, two winding rollers are fixedly connected to the outer surface of the central rotating rod, and pull ropes are fixedly connected to the outer surfaces of the two winding rollers, and the two pull ropes are respectively fixedly connected to two right-angle trapezoidal locking blocks.

[0007] By adopting the above technical solution, on the one hand, the locking of the contracted state of the lifting spring is completed through the cooperation between the ratchet groove and the right-angled trapezoidal locking block, and on the other hand, the rotation of the central rotating rod can drive the two right-angled trapezoidal locking blocks to withdraw from the two ratchet grooves.

[0008] Furthermore, the lifting assembly includes a bidirectional screw rod rotatably connected between two sides of the inner wall of the base frame, one end of the bidirectional screw rod extends to the outside of the base frame, and the outer surface of the bidirectional screw rod is threadedly connected to two C-shaped blocks, and the two C-shaped blocks are both slidably connected to the bottom of the inner wall of the base frame, and the tops of the two C-shaped blocks are hinged to two booster arms, and one end of the four booster arms is hinged to the bottom of the lifting block.

[0009] By adopting the above technical solution, the lifting block can be pushed to move up and down through the rotation of the bidirectional screw rod.

[0010] Furthermore, the driving assembly includes a driving motor fixedly connected to one side of the base frame, the outer surface of the output shaft of the driving motor is fixedly connected to a small transmission roller, one end of the bidirectional screw rod is fixedly connected to a large transmission roller, and a transmission belt is connected between the outer surfaces of the large transmission roller and the small transmission roller.

[0011] By adopting the above technical solution, the bidirectional screw rod can be driven at a reduced speed by the driving motor for selection.

[0012] Furthermore, the unlocking assembly includes a gear fixedly connected to the bottom end of the central rotating rod, the bottom of the lifting block is fixedly connected to a mounting seat, the interior of the mounting seat is movably connected to a cylindrical rack, the outer surface of the cylindrical rack is meshed with the gear, and the end of the cylindrical rack away from the gear is fixedly connected to a connecting slider.

[0013] By adopting the above technical solution, the central rotating rod can be driven to rotate through the cooperation of the cylindrical rack and the gear.

[0014] Furthermore, the unlocking component also includes a pressing groove opened between the front end surface and the bottom of the lower mold base, the interior of the pressing groove is slidably connected with an L-shaped plate, the outer surface of the L-shaped plate is provided with a lifting groove, the connecting slider is slidably connected to the interior of the lifting groove, and a pressing spring is fixedly connected between the L-shaped plate and the interior of the pressing groove.

[0015] By adopting the above technical solution, the elastic self-locking component can be unlocked when it is raised to any height.

[0016] Furthermore, the cooling assembly includes eight cooling tubes which are fixedly connected to the inside of the lower mold base, both ends of the eight cooling tubes extend to the outside of the lower mold base, six of the cooling tubes are respectively close to the front end face and the rear end face of the lower mold base, and six of the cooling assemblies are arranged in a "J" shape inside the lower mold base, one end of the eight cooling tubes is fixedly connected to an air inlet scoop, the inner walls of the eight air inlet scoops are fixedly connected to a longitudinal plate, the middle parts of the eight longitudinal plates are rotatably connected to a rotating shaft, one end of the eight rotating shafts is fixedly connected to the fan blades, and the inner walls of the eight air inlet scoops are fixedly connected to two semiconductor refrigeration plates.

[0017] By adopting the above technical solution, the backrest model that is about to be lifted up can be easily cooled and dissipated.

[0018] Furthermore, the cooling assembly also includes eight small sprockets fixedly connected to the other ends of the eight rotating shafts, one end of the drive motor output shaft is fixedly connected to a large sprocket, and a chain is transmission-connected between the large sprocket and the outer surfaces of the eight small sprockets.

[0019] By adopting the above technical solution, the fan blades can be accelerated to facilitate the delivery of cold air into the cooling pipe.

[0020] Furthermore, the mold sealing assembly includes a top frame fixedly connected to the top of the support frame, two cylinders are fixedly connected to the top of the top frame, and an upper mold is fixedly connected between the output shafts of the two cylinders.

[0021] By adopting the above technical solution, the lower mold base can be sealed, and the backrest model can be formed in cooperation with the lower mold base.

[0022] In summary, this application includes the following beneficial technical effects:

[0023] (1) The present application sets the lifting plate elastic self-locking component, the lifting component, the unlocking component and the driving component, so that when the mold lifts the backrest model, the lifting force of the backrest model can be gradually increased, thereby avoiding damage to the model caused by a large lifting force. At the same time, when the model and the inner wall of the lower mold base fall off, the elastic self-locking component can be automatically locked to avoid damage to the backrest model caused by the elastic force pushing the model to bounce up, making the mold more stable when used;

[0024] (2) The present application adopts the arrangement of gears, cylindrical racks, connecting slide blocks, L-shaped plates, central rotating rods and winding rollers. By pressing the L-shaped plates, the right-angle trapezoidal locking block can be easily driven to withdraw from the ratchet groove, which is convenient for the staff to operate and makes the mold more convenient to use;

[0025] (3) The present application arranges cooling tubes, semiconductor cooling sheets, fan blades, small sprockets and large sprockets, so that when the mold is lifting the backrest model, it can automatically cool the model in advance, thereby facilitating the subsequent demoulding of the backrest model and improving the functionality of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of this application;

[0027] Figure 2 It is a schematic diagram of the overall cross-sectional structure of this application;

[0028] Figure 3 This is a schematic diagram of the structure of the sealing mold assembly of this application;

[0029] Figure 4 This is a schematic diagram of the structure of the drive component of this application;

[0030] Figure 5 A schematic diagram of the structure of the unlocking component for this application;

[0031] Figure 6This is a schematic cross-sectional view of the elastic self-locking component of the present application;

[0032] Figure 7 For this application Figure 3 The enlarged structural diagram at A in the middle;

[0033] Figure 8 For this application Figure 5 The enlarged structural diagram at B in the middle;

[0034] Fig. 9 For this application Figure 6 Enlarged structural diagram at point C in the middle.

[0035] Description of the numbers in the figure:

[0036] 100, main module; 110, lower mold base; 120, support frame; 130, mold sealing assembly; 131, top frame; 132, cylinder; 133, upper mold; 140, base frame;

[0037] 200, self-locking elastic module; 210, lifting plate; 220, hollow sleeve; 230, elastic self-locking assembly; 231, lifting block; 232, lifting spring; 233, ratchet groove; 234, right-angle trapezoidal locking block; 235, center rotating rod; 236, winding roller; 237, torsion spring; 240, lifting assembly; 241, two-way screw rod; 242, C-block; 243, booster arm; 250, unlocking assembly; 251, gear ; 252, mounting seat; 253, cylindrical rack; 254, connecting slider; 255, L-shaped plate; 256, pressing spring; 260, driving assembly; 261, driving motor; 262, small transmission roller; 263, large transmission roller; 264, transmission belt; 270, cooling assembly; 271, cooling pipe; 272, air inlet scoop; 273, semiconductor cooling plate; 274, fan blades; 275, small sprocket; 276, large sprocket; 277, chain. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0039] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" 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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] The following is combined with Figure 1-9 This application is described in further detail.

[0042] See also Figure 1-9 A plastic backrest injection mold for a baby stroller includes a main body module 100 and a self-locking elastic module 200. The main body module 100 includes a lower mold base 110. The bottom of the lower mold base 110 is fixedly connected to a base frame 140. The top of the lower mold base 110 is fixedly connected to a support frame 120. A sealing mold assembly 130 is arranged on the top of the support frame 120. The self-locking elastic module 200 includes a lifting groove starting at the bottom of the inner wall of the lower mold base 110. A lifting plate 210 is movably connected inside the lifting groove. A hollow sleeve plate 220 is fixedly connected to the bottom of the lifting plate 210. The hollow sleeve plate 220 is fixedly connected to the bottom of the lower mold base 110. The bottom of the sleeve plate 220 extends to the interior of the base frame 140, and an elastic self-locking component 230 is arranged inside the hollow sleeve plate 220. A lifting component 240 is arranged between the two sides of the inner wall of the base frame 140, and an unlocking component 250 is arranged on the front end surface of the lower mold base 110, and the unlocking component 250 is connected to the elastic self-locking component 230. A driving component 260 is fixedly connected to one side of the base frame 140, and a cooling component 270 is arranged inside the lower mold base 110, and the cooling component 270 is connected to the driving component 260, and the lifting component 240 is connected to the elastic self-locking component 230.

[0043] During use, the mold sealing assembly 130 is opened to seal the top of the lower mold base 110, and then the lower mold base 110 is injection molded inside, so that the model is formed between the lower mold base 110 and the mold sealing assembly 130. After the model is formed, the mold sealing assembly 130 is lifted, and the driving assembly 260 is opened. The driving assembly 260 will drive the lifting assembly 240 and the driving assembly 260. The driving assembly 260 will drive the cooling assembly 270. The cooling assembly 270 will cool the model inside the lower mold base 110 to facilitate subsequent demolding. When the model is cooled to a certain degree, the lifting assembly 240 is opened. 0 will push the elastic self-locking component 230, and the elastic self-locking component 230 will gradually increase the thrust on the lifting plate 210. When the model is separated from the inside of the lower mold base 110, the elastic self-locking component 230 is automatically locked, thereby preventing the elastic self-locking component 230 from pushing the model to bounce up and damaging the model, making the mold more stable when lifting the model. The subsequent staff will take out the model, and the subsequent staff will press the unlocking component 250 to unlock the elastic self-locking component 230, so that the elastic self-locking component 230 will bounce off, and the subsequent reverse opening of the driving component 260 will drive the lifting plate 210 to reset.

[0044] The elastic self-locking assembly 230 includes a lifting block 231 movably connected to the inner wall of the hollow sleeve 220, the bottom of the lifting block 231 extends to the outside of the hollow sleeve 220, and a plurality of lifting springs 232 are fixedly connected between the top of the lifting block 231 and the top of the inner wall of the hollow sleeve 220. The lifting block 231 has two slide grooves, and the interiors of the two slide grooves are slidably connected with right-angled trapezoidal locking blocks 234. The opposite ends of the two right-angled trapezoidal locking blocks 234 extend to the outside of the lifting block 231. The other end is interactively connected with the inner walls of the two slide grooves by a contraction spring. Both sides of the inner wall of the hollow sleeve 220 are provided with ratchet grooves 233 respectively adapted to the two right-angled trapezoidal locking blocks 234. The elastic self-locking component 230 also includes a cylindrical groove opened inside the lifting block 231 and located between the two slide grooves. A central rotating rod 235 is rotatably connected between the top and the bottom of the inner wall of the cylindrical groove. The bottom end of the central rotating rod 235 extends to the bottom of the lifting block 231. The outer surface of the central rotating rod 235 near the top is aligned with the inner wall of the cylindrical groove. A torsion spring 237 is fixedly connected between the top and the bottom, two winding rollers 236 are fixedly connected to the outer surface of the central rotating rod 235, and the outer surfaces of the two winding rollers 236 are fixedly connected to pull ropes, and the two pull ropes are respectively fixedly connected to two right-angle trapezoidal locking blocks 234. The lifting assembly 240 includes a bidirectional screw rod 241 rotatably connected between the two sides of the inner wall of the base frame 140, one end of the bidirectional screw rod 241 extends to the outside of the base frame 140, and the outer surface of the bidirectional screw rod 241 is threadedly connected to two C-shaped blocks 242. The two C-shaped blocks 24 2 are slidably connected to the bottom of the inner wall of the base frame 140, the tops of the two C-shaped blocks 242 are hinged with two boosting arms 243, one end of the four boosting arms 243 is hinged to the bottom of the lifting block 231, the driving assembly 260 includes a driving motor 261 fixedly connected to one side of the base frame 140, the outer surface of the output shaft of the driving motor 261 is fixedly connected to a small transmission roller 262, one end of the bidirectional screw rod 241 is fixedly connected to a large transmission roller 263, and a transmission belt 264 is transmission-connected between the outer surfaces of the large transmission roller 263 and the small transmission roller 262.

[0045] The small transmission roller 262 will reduce the transmission speed of the large transmission roller 263 through the transmission belt 264, and the large transmission roller 263 will drive the bidirectional screw rod 241 to rotate slowly, so that the two C-shaped blocks 242 are close to each other and push the booster arm 243, and the booster arm 243 will push the lifting block 231 to rise, and the jacking spring 232 is in a pulling state, so that as the lifting block 231 rises, the jacking spring 232 gradually recovers, and the lifting block 231 rises and drives the connecting slider 254 to rise through the cylindrical rack 253. After the jacking spring 232 recovers, the right-angled trapezoidal locking block 234 will rise to the inside of the hollow sleeve plate 220, and at the same time, the lifting block 231 compresses the jacking spring 232, and the contraction of the jacking spring 232 will gradually increase. The thrust of the lifting plate 210 is applied, and when the right-angled trapezoidal locking block 234 enters the hollow sleeve plate 220, the hypotenuse of the right-angled trapezoidal locking block 234 contacts the hollow sleeve plate 220 and drives itself to be retracted into the lifting block 231. The subsequent contraction spring drives the right-angled trapezoidal locking block 234 to be stuck into the ratchet groove 233. When the lifting block 231 rises inside the hollow sleeve plate 220, the right-angled trapezoidal locking block 234 will move inside the ratchet groove 233. When the model is separated from the lower mold base 110, the ratchet groove 233 and the right-angled trapezoidal locking block 234 cooperate to achieve automatic locking of the contracted state of the lifting spring 232, thereby preventing the lifting plate 210 from pushing the model to bounce up and damaging the model, making the mold more stable when lifting the model.

[0046] The unlocking assembly 250 includes a gear 251 fixedly connected to the bottom end of the central rotating rod 235, and a mounting seat 252 is fixedly connected to the bottom of the lifting block 231. A cylindrical rack 253 is movably connected inside the mounting seat 252. The outer surface of the cylindrical rack 253 is meshed with the gear 251, and the end of the cylindrical rack 253 away from the gear 251 is fixedly connected to a connecting slider 254. The unlocking assembly 250 also includes a pressing groove opened between the front end surface and the bottom of the lower mold base 110, and an L-shaped plate 255 is slidably connected inside the pressing groove. A lifting groove is opened on the outer surface of the L-shaped plate 255, and the connecting slider 254 is slidably connected to the inside of the lifting groove, and a pressing spring 256 is fixedly connected between the L-shaped plate 255 and the inside of the pressing groove.

[0047] The L-shaped plate 255 is pressed to shrink the spring 256, and the L-shaped plate 255 pushes the cylindrical rack 253 through the connecting slider 254. The cylindrical rack 253 transmits the central rotating rod 235 through the gear 251. The cylindrical rack 253 drives the two winding rollers 236 to wind up the pull rope, thereby pulling the two right-angled trapezoidal locking blocks 234 out of the ratchet groove 233, so that the lifting plate 210 pops open. Subsequently, the reverse opening of the driving motor 261 will drive the lifting plate 210 to descend back to the inside of the lifting groove, and the gear 251 returns inside the L-shaped plate 255. After the lifting block 231 is reset to the position where the lifting spring 232 was initially stretched, the L-shaped plate 255 is released, and the pressing spring 256 drives the L-shaped plate 255 to reset, so that the two right-angled trapezoidal locking blocks 234 are reset.

[0048] The cooling assembly 270 includes eight cooling tubes 271 that are all fixedly connected to the interior of the lower mold base 110, and both ends of the eight cooling tubes 271 extend to the exterior of the lower mold base 110, six of which are respectively close to the front end face and the rear end face of the lower mold base 110, and the six cooling assemblies 270 are arranged in the interior of the lower mold base 110 in a "J" shape, and one end of the eight cooling tubes 271 is fixedly connected to an air inlet 272, and the inner walls of the eight air inlet 272 are fixedly connected to longitudinal plates, and the middle parts of the eight longitudinal plates are rotatably connected to a rotating shaft, and one end of the eight rotating shafts is fixedly connected to the fan blade 27 4. The inner walls of the eight air inlet scoops 272 are fixedly connected with two semiconductor cooling sheets 273. The cooling assembly 270 also includes eight small sprockets 275 respectively fixedly connected to the other ends of the eight rotating shafts. A large sprocket 276 is fixedly connected to one end of the output shaft of the driving motor 261. A chain 277 is transmission-connected between the large sprocket 276 and the outer surfaces of the eight small sprockets 275. The sealing mold assembly 130 includes a top frame 131 fixedly connected to the top of the support frame 120. Two cylinders 132 are fixedly connected to the top of the top frame 131. An upper mold 133 is fixedly connected between the output shafts of the two cylinders 132.

[0049] Turn on the drive motor 261, the drive motor 261 will drive the large sprocket 276 and the small transmission roller 262, the large sprocket 276 will accelerate the transmission of the small sprocket 275 through the chain 277, the small sprocket 275 will accelerate the transmission fan blades 274 through the rotating shaft to supply air to the inside of the cooling pipe 271, and the semiconductor refrigeration plate 273 cools the air to cool the model inside the lower mold base 110. The cooling effect of the model can be further improved by using eight cooling pipes 271 surrounding the model. Turn on the cylinder 132 to drive the upper mold 133 to descend, the upper mold 133 will seal the top of the lower mold base 110, and then injection molding is performed on the inside of the lower mold base 110.

[0050] The implementation principle of the embodiment of the present application is as follows: during use, the cylinder 132 is turned on to drive the upper mold 133 to descend, the upper mold 133 will seal the top of the lower mold base 110, and then the interior of the lower mold base 110 is injection molded, so that the backrest model is formed between the lower mold base 110 and the upper mold 133. After the backrest model is formed, the cylinder 132 is turned on again to drive the upper mold 133 to reset and lift, and the drive motor 261 is turned on. The drive motor 261 will drive the large sprocket 276 and the small transmission roller 262, and the large sprocket 276 will accelerate the transmission of the small sprocket 275 through the chain 277, and the small sprocket 275 will accelerate the transmission of the fan blade 274 through the rotating shaft to supply air to the inside of the cooling pipe 271, and the semiconductor refrigeration plate 273 cools the air to cool the air. The backrest model inside the lower mold base 110 is cooled, and at the same time, the small transmission roller 262 will reduce the transmission speed of the large transmission roller 263 through the transmission belt 264, and the large transmission roller 263 will drive the bidirectional screw rod 241 to rotate slowly, so that the two C-shaped blocks 242 are close to each other and push the booster arm 243, and the booster arm 243 will push the lifting block 231 to rise, and the jacking spring 232 is in a pulling state, so that as the lifting block 231 rises, the jacking spring 232 gradually recovers, and the lifting block 231 rises and drives the connecting slider 254 to rise through the cylindrical rack 253. After the jacking spring 232 recovers, the right-angled trapezoidal locking block 234 will rise to the inside of the hollow sleeve plate 220, and at the same time, the lifting block 231 compresses the jacking spring 232, and through the contraction of the jacking spring 232 The thrust on the lifting plate 210 will gradually increase, and when the right-angled trapezoidal locking block 234 enters the hollow sleeve plate 220, the hypotenuse of the right-angled trapezoidal locking block 234 contacts the hollow sleeve plate 220 and drives itself into the lifting block 231. The subsequent contraction spring drives the right-angled trapezoidal locking block 234 to be stuck in the ratchet groove 233. When the lifting block 231 rises inside the hollow sleeve plate 220, the right-angled trapezoidal locking block 234 will move inside the ratchet groove 233. When the model is separated from the lower mold base 110, the ratchet groove 233 and the right-angled trapezoidal locking block 234 cooperate to achieve automatic locking of the contracted state of the lifting spring 232, thereby preventing the lifting plate 210 from pushing the backrest model to bounce up and damage the model, making the mold more stable when lifting the backrest model, and subsequent work The operator takes out the model, presses the L-shaped plate 255 to shrink the spring 256, and the L-shaped plate 255 pushes the cylindrical rack 253 through the connecting slider 254. The cylindrical rack 253 drives the central rotating rod 235 through the gear 251. The cylindrical rack 253 drives the two winding rollers 236 to rewind the pull rope, thereby pulling the two right-angled trapezoidal locking blocks 234 out of the ratchet groove 233, so that the lifting plate 210 pops open. Subsequently, the driving motor 261 is turned on in the reverse direction, which will drive the lifting plate 210 to descend back to the inside of the lifting groove, and the gear 251 returns inside the L-shaped plate 255. After the lifting block 231 is reset to the position where the lifting spring 232 was initially stretched, the L-shaped plate 255 is released, and the pressing spring 256 drives the L-shaped plate 255 to reset.The two right-angle trapezoidal locking blocks 234 are reset.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A plastic backrest injection mold for a baby stroller, comprising a main body module (100) and a self-locking elastic module (200), Features: The main body module (100) comprises a lower mold base (110), the bottom of the lower mold base (110) is fixedly connected to a base frame (140), the top of the lower mold base (110) is fixedly connected to a support frame (120), and the top of the support frame (120) is provided with a mold sealing assembly (130); The self-locking elastic module (200) comprises a lifting groove starting at the bottom of the inner wall of the lower mold base (110), the interior of the lifting groove is movably connected to a lifting plate (210), the bottom of the lifting plate (210) is fixedly connected to a hollow sleeve plate (220), the bottom of the hollow sleeve plate (220) extends to the interior of the base frame (140), the interior of the hollow sleeve plate (220) is provided with an elastic self-locking component (230), a lifting component (240) is provided between the two sides of the inner wall of the base frame (140), and an unlocking component (250) is provided on the front end surface of the lower mold base (110), and the unlocking component (250) is connected to the elastic The bottom of the base frame (140) is connected to a self-locking component (230), a driving component (260) is fixedly connected to one side of the base frame (140), a cooling component (270) is arranged inside the lower mold base (110), the cooling component (270) is connected to the driving component (260), the lifting component (240) is connected to the elastic self-locking component (230), the elastic self-locking component (230) comprises a lifting block (231) movably connected to the inner wall of the hollow sleeve plate (220), the bottom of the lifting block (231) extends to the outside of the hollow sleeve plate (220), the top of the lifting block (231) is connected to the top of the inner wall of the hollow sleeve plate (220), and the lifting block (231) is connected to the inner wall of the hollow sleeve plate (220). A plurality of lifting springs (232) are fixedly connected between the lifting block (231), two sliding grooves are provided inside the lifting block (231), and right-angled trapezoidal locking blocks (234) are slidably connected inside the two sliding grooves. The opposite ends of the two right-angled trapezoidal locking blocks (234) extend to the outside of the lifting block (231), and the other ends of the two right-angled trapezoidal locking blocks (234) are interactively connected to the inner walls of the two sliding grooves with contraction springs. Both sides of the inner wall of the hollow sleeve plate (220) are provided with ratchet grooves (233) respectively adapted to the two right-angled trapezoidal locking blocks (234). The elastic self-locking component (230) also includes a lifting block provided on the lifting block. (231) a cylindrical groove inside and between the two slide grooves, a central rotating rod (235) is rotatably connected between the top and bottom of the inner wall of the cylindrical groove, the bottom end of the central rotating rod (235) extends to the bottom of the lifting block (231), a torsion spring (237) is fixedly connected between the position of the outer surface of the central rotating rod (235) near the top and the top of the inner wall of the cylindrical groove, the outer surface of the central rotating rod (235) is fixedly connected to two winding rollers (236), the outer surfaces of the two winding rollers (236) are fixedly connected to pull ropes, and the two pull ropes are respectively fixedly connected to two right-angle trapezoidal locking blocks (234); The unlocking assembly (250) comprises a gear (251) fixedly connected to the bottom end of the central rotating rod (235); the bottom of the lifting block (231) is fixedly connected to a mounting seat (252); the interior of the mounting seat (252) is movably connected to a cylindrical rack (253); the outer surface of the cylindrical rack (253) is meshed with the gear (251); and the end of the cylindrical rack (253) away from the gear (251) is fixedly connected to a connecting slider (254); The unlocking assembly (250) further comprises a pressing groove formed between the front end surface and the bottom of the lower die base (110); an L-shaped plate (255) is slidably connected to the interior of the pressing groove; a lifting groove is formed on the outer surface of the L-shaped plate (255); the connecting slider (254) is slidably connected to the interior of the lifting groove; and a pressing spring (256) is fixedly connected between the L-shaped plate (255) and the interior of the pressing groove.

2. The plastic backrest injection mold for a baby stroller according to claim 1, Features: The lifting assembly (240) comprises a bidirectional screw rod (241) rotatably connected between two sides of the inner wall of the base frame (140); one end of the bidirectional screw rod (241) extends to the outside of the base frame (140); two C-shaped blocks (242) are threadedly connected to the outer surface of the bidirectional screw rod (241); the two C-shaped blocks (242) are slidably connected to the bottom of the inner wall of the base frame (140); the tops of the two C-shaped blocks (242) are hinged with two boosting arms (243); one end of the four boosting arms (243) is hinged to the bottom of the lifting block (231).

3. The plastic backrest injection mold for a baby stroller according to claim 2, Features: The driving assembly (260) comprises a driving motor (261) fixedly connected to one side of the base frame (140); a small transmission roller (262) is fixedly connected to the outer surface of the output shaft of the driving motor (261); a large transmission roller (263) is fixedly connected to one end of the bidirectional screw rod (241); and a transmission belt (264) is transmission-connected between the outer surfaces of the large transmission roller (263) and the small transmission roller (262).

4. The plastic backrest injection mold for a baby stroller according to claim 3, Features: The cooling assembly (270) comprises eight cooling tubes (271) which are all fixedly connected to the interior of the lower mold base (110), both ends of the eight cooling tubes (271) extend to the exterior of the lower mold base (110), six of the cooling tubes (271) are respectively close to the front end face and the rear end face of the lower mold base (110), and the six cooling assemblies (270) are arranged in a "J" shape inside the lower mold base (110), one end of the eight cooling tubes (271) is fixedly connected to an air inlet scoop (272), the inner walls of the eight air inlet scoops (272) are fixedly connected to a longitudinal plate, the middle parts of the eight longitudinal plates are rotatably connected to a rotating shaft, one end of the eight rotating shafts is fixedly connected to a fan blade (274), and the inner walls of the eight air inlet scoops (272) are fixedly connected to two semiconductor cooling plates (273).

5. The plastic backrest injection mold for a baby stroller according to claim 4, Features: The cooling assembly (270) further comprises eight small sprockets (275) respectively fixedly connected to the other ends of the eight rotating shafts; one end of the output shaft of the driving motor (261) is fixedly connected to a large sprocket (276); and a chain (277) is transmission-connected between the large sprocket (276) and the outer surfaces of the eight small sprockets (275).

6. The plastic backrest injection mold for a baby stroller according to claim 5, Features: The mold sealing assembly (130) comprises a top frame (131) fixedly connected to the top of the support frame (120), two cylinders (132) are fixedly connected to the top of the top frame (131), and an upper mold (133) is fixedly connected between the output shafts of the two cylinders (132).

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