Built-in connector elastic sheet punch forming die of smart watch

Abstract

The invention relates to the technical field of punch forming dies, in particular to a smartwatch built-in connector elastic piece punch forming die which comprises a mounting base, a lower die base is movably inserted into the mounting base, an upper die base is arranged above the lower die base, and a product positioning pin is arranged on the inner wall of one side of the lower die base in a sliding fit mode. The first forming mechanism is fixedly connected to the inner wall of one side of the lower die base, the second forming mechanism is fixedly connected to the inner wall of the middle of the lower die base, and the third forming mechanism is rotatably connected to the inner wall of the other side of the lower die base. According to the invention, the processing of multi-time punch forming of the built-in connector elastic sheet of the smart watch can be realized through a single cavity, the production interruption time is reduced, the production line is more efficient, the maintenance of a single die is relatively simple, the fault rate is low, the maintenance and repair cost can be effectively reduced, the production efficiency is improved, the cost effectiveness is improved, and the product quality is improved.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, and more particularly to a stamping die for a built-in connector spring of a smartwatch. Background Technology

[0002] Stamping dies are tools used in metal processing, primarily for shaping metal sheets (such as steel, aluminum, and stainless steel) into desired shapes and sizes through stamping processes. Stamping dies mainly consist of a die base, die core, die backing plate, guide pillars / sleeves, and other accessories. With the development of industrial technology, aluminum alloys, due to their lightweight, high strength, and good corrosion resistance, are widely used in aerospace, automotive, electronics, and construction industries. Precision aluminum alloy forgings, as an important aluminum alloy product, typically involve heating aluminum alloy ingots, forging at high temperatures, and subsequent heat treatment and surface treatment. The manufacture of precision aluminum alloy forgings requires high-precision dies to ensure dimensional accuracy and performance.

[0003] Existing stamping dies require multiple sequential forming cavities to stamp the product when stamping the built-in connector springs of smartwatches. This results in longer cooling times and more complex alignment procedures, increasing production changeover time and impacting overall efficiency.

[0004] In summary, the existing technology lacks a technique for using a single forming cavity to achieve multiple forming processes when stamping the built-in connector spring of a smartwatch using a stamping die. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a stamping mold for the built-in connector spring of a smartwatch.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a stamping mold for a built-in connector spring of a smart watch, including a mounting base, a lower mold base movably inserted on the mounting base, an upper mold base above the lower mold base, a product positioning pin slidably fitted on one inner wall of the lower mold base, a first forming mechanism fixedly connected to one inner wall of the lower mold base, a second forming mechanism fixedly connected to the middle inner wall of the lower mold base, and a third forming mechanism rotatably connected to the other inner wall of the lower mold base.

[0007] Preferably, a worm gear is rotatably connected to both inner walls of the mounting base. A worm wheel is meshed and driven on one side of the inner end of the worm gear. A universal joint assembly is fixedly connected to the worm wheel. Both ends of the universal joint assembly are rotatably connected to the inner wall of the mounting base. Mounting rods are fixedly connected to both ends of the universal joint assembly. Mounting grooves are opened on both inner walls of the bottom end of the lower mold base. The outer wall of the mounting rod is movably inserted into the inner wall of the mounting groove.

[0008] Preferably, a spring is fixedly connected to the bottom end of the product positioning pin, and the other end of the spring is fixedly connected to the inner wall of the lower mold base. A pressure rod is fixedly connected to the upper mold base on the side facing the product positioning pin, and one end of the pressure rod is in movable contact with one end of the product positioning pin.

[0009] Preferably, the first forming mechanism includes two guide rods, the two ends of which are fixedly connected to the inner wall of the lower mold base, and a first pressure plate and a first baffle are symmetrically and slidably fitted between the outer walls of the two guide rods.

[0010] Preferably, two springs are fixedly connected between one side of the first pressure plate and the first baffle and the inner wall of the lower mold base. Trapezoidal blocks are fixedly connected at the positions of the upper mold base facing the first pressure plate and the first baffle. The inclined surfaces and one outer wall of the two trapezoidal blocks are respectively in sliding contact with one side of the first pressure plate and the first baffle.

[0011] Preferably, the second forming mechanism includes an electric push rod, one end of which is fixedly connected to the inner wall of the lower mold base. A second pressure plate is fixedly connected to the output end of the electric push rod. A transmission frame is fixedly connected to one side of the second pressure plate. A transmission rod is slidably fitted on the inner wall of the bottom end of the transmission frame. Both ends of the transmission rod are rotatably connected to the inner wall of the lower mold base. A transmission groove is formed on the outer wall of one end of the transmission rod. The transmission groove consists of two parts: a spiral and a straight structure. The inner wall of the transmission groove is slidably fitted with a protrusion on the inner wall of the bottom end of the transmission frame.

[0012] Preferably, a threaded rod is fixedly connected to the other end of the transmission rod, and a movable frame is threadedly connected to the outer wall of the threaded rod. An adjusting frame is slidably fitted on the movable frame. A tension spring is fixedly connected to both ends of the adjusting frame and the movable frame. The other end of the tension spring is fixedly connected to the inner wall of the movable frame. A second baffle is fixedly connected to one end of the adjusting frame. An inclined surface is formed on the inner wall of the lower mold base near the second baffle, and the second baffle is slidably contacted with the inclined surface.

[0013] Preferably, the third forming mechanism includes a second worm gear, which is rotatably connected to the inner wall of the lower mold base. A transmission wheel is fixedly connected to one end of the second worm gear, and a transmission rack is fixedly connected to the side of the upper mold base facing the transmission wheel. The transmission wheel and the transmission rack mesh and transmit power. Worm wheels are meshed and transmitted power on both sides of the second worm gear. A connecting rod assembly is fixedly connected to the second worm wheel. One end of the connecting rod assembly is rotatably connected to the inner wall of the lower mold base, and a third pressure plate is rotatably connected between the other ends of the two connecting rod assemblies.

[0014] Preferably, the lower side of the third pressure plate is provided with a slidable inclined block, the bottom end of the inclined block is fixedly connected to a sliding plate, the sliding plate is slidably engaged with the inner wall of the lower mold base, a plurality of tension springs are fixedly connected between the lower side of the sliding plate and the inner wall of the lower mold base, and a bending stop bar is fixedly connected to one end of the sliding plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting the first forming mechanism, the second forming mechanism and the third forming mechanism in the lower mold base cavity, the processing of multiple stamping of the built-in connector spring of the smart watch can be realized in a single cavity, which reduces the production interruption time, makes the production line more efficient, the maintenance of a single mold is relatively simple, the failure rate is low, and the maintenance and repair costs can be effectively reduced, which can promote the improvement of production efficiency, cost-effectiveness and product quality of the built-in connector spring of the smart watch.

[0017] 2. By setting product positioning pins in the lower mold base cavity, the product can be accurately positioned during the processing of the first forming mechanism, making subsequent processing steps more precise and avoiding quality problems caused by positional deviations. At the same time, the retractable product positioning pins, when the upper mold base moves down, will drive the pressure rod to move down. After the upper mold base drives the first forming mechanism to process the product, the pressure rod will contact and push the product positioning pin down, so that the subsequent second and third forming mechanisms can perform further bending processing on the product. This not only achieves precise product positioning, but also optimizes the overall forming process, further improving production efficiency and product quality.

[0018] 3. By setting a rotatable mounting rod in the mounting base, the replacement process of the lower mold base is made simpler and faster. Operators can quickly adjust the mold to adapt to the processing requirements of different products, which improves production flexibility, reduces costs, facilitates operation, improves product quality, and makes the overall design more adaptable. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a stamping die for a built-in connector spring of a smartwatch according to the present invention.

[0020] Figure 2 This is a schematic diagram illustrating the overall structure of a stamping die for a built-in connector spring in a smartwatch according to the present invention.

[0021] Figure 3 This is a partial sectional view of the mounting base and lower die base structure of the stamping mold for the built-in connector spring sheet of a smartwatch according to the present invention.

[0022] Figure 4 This is a schematic diagram of the product positioning pin structure of a stamping die for a built-in connector spring sheet of a smartwatch according to the present invention.

[0023] Figure 5 This is a schematic diagram of the upper mold base structure of a stamping die for a built-in connector spring sheet of a smartwatch according to the present invention;

[0024] Figure 6 This is a schematic diagram of the first forming mechanism of a stamping die for a built-in connector spring of a smartwatch according to the present invention.

[0025] Figure 7 This is a partial cross-sectional view of the second forming mechanism structure of the stamping die for the built-in connector spring of a smartwatch according to the present invention.

[0026] Figure 8 This is a schematic diagram of the third forming mechanism of a stamping die for a built-in connector spring of a smartwatch according to the present invention.

[0027] The diagram shows: 1. Mounting base; 2. Lower mold base; 3. Upper mold base; 4. Product positioning pin; 5. First forming mechanism; 6. Second forming mechanism; 7. Third forming mechanism; 101. Worm gear one; 102. Worm wheel one; 103. Universal joint assembly; 104. Mounting rod; 201. Mounting groove; 301. Pressure rod; 302. Trapezoidal block; 303. Transmission rack; 401. Spring one; 501. Guide rod; 502. First pressure plate; 503. First baffle; 50 4. Spring II; 601. Electric actuator; 602. Second pressure plate; 603. Transmission frame; 604. Transmission rod; 605. Transmission groove; 606. Threaded rod; 607. Moving frame; 608. Adjusting frame; 609. Tension spring I; 610. Second baffle; 701. Worm II; 702. Transmission wheel; 703. Worm wheel II; 704. Connecting rod assembly; 705. Third pressure plate; 706. Inclined block; 707. Slide plate; 708. Tension spring II; 709. Bending stop bar. Detailed Implementation

[0028] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0029] like Figures 1-8 The diagram illustrates a stamping die for a built-in connector spring of a smartwatch, comprising a mounting base 1, a lower die base 2 movably inserted into the mounting base 1, an upper die base 3 positioned above the lower die base 2, a product positioning pin 4 slidably fitted onto one inner wall of the lower die base 2, a first forming mechanism 5 fixedly connected to one inner wall of the lower die base 2, a second forming mechanism 6 fixedly connected to the middle inner wall of the lower die base 2, and a third forming mechanism 7 rotatably connected to the other inner wall of the lower die base 2. Figure 2 The middle side, from right to left, shows the product's form after being processed by the first forming mechanism 5, the second forming mechanism 6, and the third forming mechanism 7.

[0030] like Figure 3 As shown, a worm gear 101 is rotatably connected to both inner walls of the mounting base 1. A worm wheel 102 is meshed and driven on one side of the inner end of the worm gear 101. A universal joint assembly 103 is fixedly connected to the worm wheel 102. Both ends of the universal joint assembly 103 are rotatably connected to the inner wall of the mounting base 1. Mounting rods 104 are fixedly connected to both ends of the universal joint assembly 103. Mounting grooves 201 are opened on both inner walls of the bottom end of the lower mold base 2. The outer wall of the mounting rod 104 is movably inserted into the inner wall of the mounting groove 201.

[0031] The worm gear 101 and worm wheel 102 have a self-locking function, which can ensure that the mounting rod 104 is firmly positioned and does not loosen.

[0032] like Figure 4 , Figure 5 As shown, a spring 401 is fixedly connected to the bottom end of the product positioning pin 4, and the other end of the spring 401 is fixedly connected to the inner wall of the lower mold base 2. A pressure rod 301 is fixedly connected to the upper mold base 3 on the side facing the product positioning pin 4, and one end of the pressure rod 301 is in contact with one end of the product positioning pin 4.

[0033] The top of the product positioning pin 4 is chamfered to facilitate quick positioning of the workpiece to be processed; the spring 401 is a stainless steel compression spring, which can ensure that the product positioning pin 4 always remains in the extended state, and the positioning is reliable; the pressure rod 301 is made of alloy steel, which can accurately adapt to the positioning and avoidance requirements of different processing stages.

[0034] like Figure 5 , Figure 6 As shown, the first forming mechanism 5 includes two guide rods 501. The two ends of the guide rods 501 are fixedly connected to the inner wall of the lower mold base 2. The outer walls of the two guide rods 501 are symmetrically fitted with a first pressure plate 502 and a first baffle 503.

[0035] The guide rod 501 is made of stainless steel, with high guiding accuracy, and can achieve precise stamping of one end of the spring piece.

[0036] Two springs 504 are fixedly connected between one side of the first pressure plate 502 and the first baffle 503 and the inner wall of the lower mold base 2. Trapezoidal blocks 302 are fixedly connected at the positions of the upper mold base 3 facing the first pressure plate 502 and the first baffle 503. The inclined surfaces and one outer wall of the two trapezoidal blocks 302 are respectively in sliding contact with one side of the first pressure plate 502 and the first baffle 503.

[0037] Spring 2 504 is a high-elasticity mold spring, which can ensure that the first pressure plate 502 and the first baffle 503 can be quickly reset after stamping. The trapezoidal block 302 can efficiently convert the vertical downward force of the upper mold base 3 into the horizontal extrusion force of the first pressure plate 502 and the first baffle 503.

[0038] like Figure 7 As shown, the second molding mechanism 6 includes an electric push rod 601. One end of the electric push rod 601 is fixedly connected to the inner wall of the lower mold base 2. A second pressure plate 602 is fixedly connected to the output end of the electric push rod 601. A transmission frame 603 is fixedly connected to one side of the second pressure plate 602. A transmission rod 604 is slidably fitted on the inner wall of the bottom end of the transmission frame 603. Both ends of the transmission rod 604 are rotatably connected to the inner wall of the lower mold base 2. A transmission groove 605 is opened on the outer wall of one end of the transmission rod 604. The transmission groove 605 is composed of two parts: a spiral structure and a straight structure. The inner wall of the transmission groove 605 is slidably fitted with the protrusion on the inner wall of the bottom end of the transmission frame 603.

[0039] The second pressure plate 602 is made of mold steel, which can realize the precise secondary forming of the spring sheet. The spiral structure of the transmission groove 605 can efficiently convert the linear motion of the electric push rod 601 into the rotational motion of the transmission rod 604.

[0040] A threaded rod 606 is fixedly connected to the other end of the transmission rod 604. A movable frame 607 is threadedly connected to the outer wall of the threaded rod 606. An adjusting frame 608 is slidably fitted on the movable frame 607. A tension spring 609 is fixedly connected to both ends of the adjusting frame 608 and the movable frame 607. The other end of the tension spring 609 is fixedly connected to the inner wall of the movable frame 607. A second baffle 610 is fixedly connected to one end of the adjusting frame 608. An inclined surface is opened on the inner wall of the lower mold base 2 near the second baffle 610. The second baffle 610 is slidably contacted with the inclined surface.

[0041] The threaded rod 606 and tension spring 609 ensure that the second baffle 610 moves out and retracts automatically, avoiding the third forming mechanism 7.

[0042] like Figure 5 , Figure 8As shown, the third forming mechanism 7 includes a second worm gear 701, which is rotatably connected to the inner wall of the lower mold base 2. A transmission wheel 702 is fixedly connected to one end of the second worm gear 701. A transmission rack 303 is fixedly connected to the side of the upper mold base 3 facing the transmission wheel 702. The transmission wheel 702 and the transmission rack 303 mesh and transmit power. Worm wheels 703 are meshed and transmitted power on both sides of the second worm gear 701. A connecting rod assembly 704 is fixedly connected to the second worm wheel 703. One end of the connecting rod assembly 704 is rotatably connected to the inner wall of the lower mold base 2. A third pressure plate 705 is rotatably connected between the other ends of the two connecting rod assemblies 704.

[0043] Worm gear 701 and worm wheel 703 have a self-locking function, which can ensure the stability of the position of the third pressure plate 705 after it is formed; the transmission wheel 702 and transmission rack 303 can accurately convert the vertical downward force of the upper mold base 3 into the rotational motion of worm gear 701, which can realize the precise bending and forming of the spring sheet.

[0044] The third pressure plate 705 has a slidable contact inclined block 706 on its lower side. The bottom end of the inclined block 706 is fixedly connected to a slide plate 707. The slide plate 707 is slidably fitted with the inner wall of the lower mold base 2. Multiple tension springs 708 are fixedly connected between the lower side of the slide plate 707 and the inner wall of the lower mold base 2. A bending stop bar 709 is fixedly connected to one end of the slide plate 707.

[0045] The inclined surface of the inclined block 706 is polished, which makes it highly efficient in sliding contact with the third pressure plate 705. It can convert the horizontal movement of the third pressure plate 705 into the vertical movement of the sliding plate 707. When the third pressure plate 705 moves, it can release the limit on the bending stop 709, so that it can automatically move upward under the action of the tension spring 708 and stop at the bending point of the product to ensure the bending effect.

[0046] By setting the first forming mechanism 5, the second forming mechanism 6 and the third forming mechanism 7 in the cavity of the lower mold base 2, the multiple stamping forming of the built-in connector spring of the smartwatch can be realized in a single cavity, which reduces the production interruption time, makes the production line more efficient, the maintenance of a single mold is relatively simple, the failure rate is low, and the maintenance and repair costs can be effectively reduced, which can promote the improvement of production efficiency, cost-effectiveness and product quality of the built-in connector spring of the smartwatch.

[0047] Working principle: According to the model and specifications of the built-in connector spring of the smartwatch to be processed, select the appropriate lower mold base 2, place the lower mold base 2 on the mounting base 1, and align the mounting groove 201 with the mounting rod 104; rotate the worm gear 101, which drives the worm wheel 102 to rotate, and the worm wheel 102 drives the mounting rods 104 at both ends to rotate through the universal joint assembly 103, so that the mounting rods 104 are accurately inserted into the mounting groove 201, and the lower mold base 2 is fixed.

[0048] Then the operator places the pre-processed spring blank in the forming area of ​​the lower die 2. The product positioning pin 4 extends under the action of spring 401 and inserts into the positioning hole of the blank to achieve accurate initial positioning of the blank. The stamping equipment is started and the upper die 3 moves vertically downward under the drive mechanism to start the stamping process.

[0049] During the downward movement of the upper mold base 3, the trapezoidal block 302 at its bottom first contacts the first pressure plate 502 and the first baffle 503 of the first forming mechanism 5; as the upper mold base 3 continues to move downward, the inclined surface of the trapezoidal block 302 pushes the first pressure plate 502 and the first baffle 503 to slide horizontally along the guide rod 501, and the second spring 504 is stretched; the first pressure plate 502 and the first baffle 503 cooperate with each other to perform preliminary stamping and forming on one end of the blank, completing the bending shape processing of one end of the spring sheet; during this stage, the product positioning pin 4 always remains extended to ensure the stable positioning of the blank.

[0050] As the upper mold base 3 continues to descend, its bottom pressure rod 301 contacts the product positioning pin 4 and pushes it downward. Spring 401 is compressed, and the product positioning pin 4 exits from the positioning hole of the blank, completing the avoidance. At this time, the first pressure plate 502 and the first baffle 503 maintain the clamping and positioning function of the product. Subsequently, the electric push rod 601 of the second forming mechanism 6 is activated. The electric push rod 601 pushes the second pressure plate 602 to move towards the blank, performing secondary stamping on the initially formed blank. At the same time, the second pressure plate 602 drives the transmission frame 603 to move, and the protrusion at the bottom of the transmission frame 603 moves along the... The transmission groove 605 of the transmission rod 604 slides, causing the transmission rod 604 to rotate; the transmission rod 604 drives the threaded rod 606 to rotate, and the threaded rod 606 drives the moving frame 607 to move. The moving frame 607 drives the second baffle 610 to slide along the inclined surface of the lower mold base 2 through the adjusting frame 608, so that the second baffle 610 moves out of the lower mold base 2. Then the second baffle 610 cooperates with the second pressure plate 602 to ensure the positional accuracy of the secondary forming; after the secondary forming is completed, the electric push rod 601 retracts and resets, and the second baffle 610 returns to its initial state under the action of the tension spring 609.

[0051] Then, the upper mold base 3 continues to descend to its lowest position. The transmission rack 303 on its side meshes with the transmission wheel 702 of the third forming mechanism 7, driving the worm gear 701 to rotate. The worm gear 701 drives the worm wheels 703 on both sides to rotate. The worm wheels 703 drive the connecting rod group 704 to swing. The connecting rod group 704 drives the third pressure plate 705 to move, bending the blank of the secondary forming. During the process of the third pressure plate 705 moving without contacting the product, it does not contact the inclined block 706. At this time, the tension spring 708 drives the slide plate 707 to move upward along the inner wall of the lower mold base 2, so that the bending stop bar 709 moves upward and stops at the bending point of the spring sheet. Then, it works with the third pressure plate 705 to ensure the bending angle is accurate. After the bending is completed, the upper mold base 3 begins to move upward and reset.

[0052] During the upward movement of the upper die base 3, the transmission rack 303 meshes with the transmission wheel 702 in the opposite direction, driving the components of the third forming mechanism 7 to reset, and the bending stop 709 returns to its initial position; the first pressure plate 502 and the first baffle 503 of the first forming mechanism 5 are reset under the action of the second spring 504; the product positioning pin 4 extends and resets under the action of the first spring 401; the operator removes the formed spring sheet from the lower die base 2, completing the single stamping process; repeating the above steps, the batch continuous production of spring sheets is realized.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stamping die for a built-in connector spring of a smartwatch, comprising a mounting base (1), characterized in that: A lower mold base (2) is movably inserted into the mounting base (1), and an upper mold base (3) is provided above the lower mold base (2). A product positioning pin (4) is slidably fitted on one side of the inner wall of the lower mold base (2). A first forming mechanism (5) is fixedly connected to one side of the inner wall of the lower mold base (2). A second forming mechanism (6) is fixedly connected to the middle inner wall of the lower mold base (2). A third forming mechanism (7) is rotatably connected to the other side of the inner wall of the lower mold base (2).

2. The stamping die for the built-in connector spring of a smartwatch according to claim 1, characterized in that: The mounting base (1) has a worm gear (101) rotatably connected to both inner walls on both sides. A worm wheel (102) is meshed and driven on one side of the inner end of the worm gear (101). A universal joint assembly (103) is fixedly connected to the worm wheel (102). Both ends of the universal joint assembly (103) are rotatably connected to the inner wall of the mounting base (1). Both ends of the universal joint assembly (103) are fixedly connected to mounting rods (104). The lower mold base (2) has mounting grooves (201) on both inner walls on both sides at the bottom. The outer wall of the mounting rod (104) is movably inserted into the inner wall of the mounting groove (201).

3. The stamping die for the built-in connector spring of a smartwatch according to claim 1, characterized in that: A spring (401) is fixedly connected to the bottom end of the product positioning pin (4), and the other end of the spring (401) is fixedly connected to the inner wall of the lower mold base (2). A pressure rod (301) is fixedly connected to the upper mold base (3) on the side facing the product positioning pin (4), and one end of the pressure rod (301) is in contact with one end of the product positioning pin (4).

4. The stamping die for the built-in connector spring of a smartwatch according to claim 1, characterized in that: The first forming mechanism (5) includes two guide rods (501). The two ends of the guide rods (501) are fixedly connected to the inner wall of the lower mold base (2). The outer walls of the two guide rods (501) are symmetrically fitted with a first pressure plate (502) and a first baffle (503).

5. The stamping die for the built-in connector spring of a smartwatch according to claim 4, characterized in that: Two springs (504) are fixedly connected between one side of the first pressure plate (502) and the first baffle (503) and the inner wall of the lower mold base (2). Trapezoidal blocks (302) are fixedly connected at the positions of the upper mold base (3) facing the first pressure plate (502) and the first baffle (503). The inclined surfaces and one outer wall of the two trapezoidal blocks (302) are respectively in sliding contact with one side of the first pressure plate (502) and the first baffle (503).

6. The stamping die for the built-in connector spring of a smartwatch according to claim 1, characterized in that: The second forming mechanism (6) includes an electric push rod (601). One end of the electric push rod (601) is fixedly connected to the inner wall of the lower mold base (2). A second pressure plate (602) is fixedly connected to the output end of the electric push rod (601). A transmission frame (603) is fixedly connected to one side of the second pressure plate (602). A transmission rod (604) is slidably fitted on the inner wall of the bottom end of the transmission frame (603). Both ends of the transmission rod (604) are rotatably connected to the inner wall of the lower mold base (2). A transmission groove (605) is opened on the outer wall of one end of the transmission rod (604). The transmission groove (605) is composed of two parts: a spiral structure and a straight structure. The inner wall of the transmission groove (605) is slidably fitted with the protrusion of the inner wall of the bottom end of the transmission frame (603).

7. The stamping die for the built-in connector spring of a smartwatch according to claim 6, characterized in that: The transmission rod (604) is fixedly connected to a threaded rod (606) at the other end. A movable frame (607) is threadedly connected to the outer wall of the threaded rod (606). An adjusting frame (608) is slidably fitted on the movable frame (607). A tension spring (609) is fixedly connected to both ends of the adjusting frame (608) and the movable frame (607). The other end of the tension spring (609) is fixedly connected to the inner wall of the movable frame (607). A second baffle (610) is fixedly connected to one end of the adjusting frame (608). An inclined surface is opened on the inner wall of the lower mold base (2) near the second baffle (610). The second baffle (610) is slidably contacted with the inclined surface.

8. The stamping die for the built-in connector spring of a smartwatch according to claim 1, characterized in that: The third forming mechanism (7) includes a second worm gear (701), which is rotatably connected to the inner wall of the lower mold base (2). A transmission wheel (702) is fixedly connected to one end of the second worm gear (701). A transmission rack (303) is fixedly connected to the side of the upper mold base (3) facing the transmission wheel (702). The transmission wheel (702) and the transmission rack (303) are meshed and driven. Worm wheels (703) are meshed and driven on both sides of the second worm gear (701). A connecting rod group (704) is fixedly connected to the second worm wheel (703). One end of the connecting rod group (704) is rotatably connected to the inner wall of the lower mold base (2). A third pressure plate (705) is rotatably connected between the other ends of the two connecting rod groups (704).

9. The stamping die for the built-in connector spring of a smartwatch according to claim 8, characterized in that: The third pressure plate (705) has a slidable contact with a ramp block (706) on its lower side. A slide plate (707) is fixedly connected to the bottom end of the ramp block (706). The slide plate (707) is slidably engaged with the inner wall of the lower mold base (2). Multiple tension springs (708) are fixedly connected between the lower side of the slide plate (707) and the inner wall of the lower mold base (2). A bending stop bar (709) is fixedly connected to one end of the slide plate (707).

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