A protective charger for lithium batteries

Abstract

The application discloses a protective charger for lithium batteries, and relates to the technical field of lithium battery chargers, which comprises a charger body, a power supply wire harness for supplying power to lithium batteries arranged at the right end of the charger body, and an input socket connected with a power supply source arranged at the left end of the charger body; a disconnecting assembly is arranged inside the left end of the charger body; the disconnecting assembly comprises a thermal memory metal sheet which is attached to the right end outer wall of the input socket inside the charger body; a flow guide assembly is arranged inside the charger body, and the flow guide assembly comprises a flow guide opening window. The protective charger for lithium batteries realizes normal heat exchange through the exhaust fan module inside the charger body, and when the temperature is abnormally high, the thermal memory metal sheet drives the disconnecting partition to slide, separates the power connection end inside the input socket, and completely opens the flow guide vertical groove, so that the optimal balance between safety protection and heat dissipation efficiency is realized.

Description

Technical Field

[0001] This invention relates to the field of lithium battery charger technology, specifically a protective charger for lithium batteries. Background Technology

[0002] A lithium battery charger is an energy conversion device specifically designed for lithium-ion or lithium polymer batteries. Its core function is to safely and efficiently convert AC mains power (such as a 220V household socket) into DC power that meets the characteristics of lithium batteries. It adopts a constant current / constant voltage (CC / CV) intelligent charging mode and precisely controls the charging process through three stages: pre-charging, constant current fast charging, and constant voltage replenishment. Modern products generally adopt a PFC+LLC high-efficiency power architecture and are equipped with an aluminum alloy shell to enhance heat dissipation.

[0003] Application CN208461515U discloses a lithium battery charger. By adding a locking part to the lithium battery charger, the lithium battery inside the charger is fixed, which makes the charging process of the lithium battery charger stable and effectively avoids the interruption of charging effect due to poor contact. Furthermore, the locking part is controlled to switch between an open state and a locked state by connecting a drive part and a reset part to a movable part, which increases the convenience of using the lithium battery charger and improves the user experience.

[0004] Application CN216530645U discloses a lithium battery charger with heat dissipation and shock resistance. By incorporating an air inlet, thermal conductive adhesive, air outlet, temperature sensor, connecting plate, cooling fan, guide plate, side plate, base plate, sheath, mesh, winding post, limiting plate, locking block, heat-conducting sheet, and heat-conducting pillar, it solves the problems of existing lithium battery chargers lacking heat dissipation and shock resistance. These problems include the inability to dissipate internal heat during charging, which can negatively impact the lifespan of the charger, and the difficulty in providing shock resistance, leading to damage from impacts and reduced practicality.

[0005] However, the chargers for lithium batteries disclosed above still have the following problems in actual use: heat exchange of charging components is achieved by setting various types of heat dissipation components and heat dissipation windows inside the charger, but the charger is an electrical energy conversion device, and the heat generated during the charging process is affected by various factors. Simply adding heat dissipation components cannot take into account the arrangement in a small space, and it is also impossible to disconnect the power supply in case of overheating, thereby increasing the power consumption and affecting the normal charging operation of the charger.

[0006] Therefore, we propose a protective charger for lithium batteries to address the aforementioned problems. Summary of the Invention

[0007] The purpose of this invention is to provide a protective charger for lithium batteries. This addresses the problem that existing chargers use various types of heat dissipation components and ventilation windows inside the charger to achieve heat exchange of the charging components. However, since the charger is an energy conversion device, the heat generated during the charging process is affected by various factors. Simply adding heat dissipation components cannot take into account the limited space, nor can it disconnect the power supply in case of overheating, thereby increasing energy consumption and affecting the normal charging operation of the charger.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a protective charger for lithium batteries, comprising a charger body, wherein a power supply harness for supplying power to the lithium battery is provided at the right end of the charger body, and an input socket for interconnection with a power supply is provided at the left end of the charger body.

[0009] The left end of the charger body is provided with a disconnection component, and the disconnection component includes a disconnection partition, which is slidably installed inside the input socket.

[0010] The disconnection component includes a thermal memory metal sheet, which is attached to the outer right wall of the input socket inside the charger body.

[0011] The charger body has a current guiding component inside, and the current guiding component includes a current guiding window, and a current guiding resistor is provided at the right end of the current guiding window.

[0012] Preferably, the input socket is fixedly installed inside the front left side of the charger body, and the input socket is connected to the charging component inside the charger body. A power-connecting metal strip is fixedly installed inside the input socket, and the power-connecting metal strip inside the input socket is plugged into the power-connecting wire harness to realize power input operation.

[0013] Preferably, the disconnection assembly includes a guide groove, which is located on the front and rear sides of the input socket inside the charger body. A guide screw is rotatably mounted inside the guide groove via a bearing, and a guide slider is threaded through the outer wall of the guide screw. The guide slider is fixedly mounted on the outside of the disconnection partition.

[0014] Preferably, the disconnection component includes a positioning bracket, which is fixedly installed inside the left end of the charger body. Limiting frames are fixedly installed on both the front and rear sides of the top of the positioning bracket, and the lower end of the thermal memory metal sheet is fixedly connected to the inner bottom surface of the limiting frame, so that the limiting frame positions the thermal memory metal sheet.

[0015] Preferably, the disconnection assembly includes a guide slide rod, which is fixedly installed inside the limiting frame. A lifting bracket is slidably connected to the outer wall of the guide slide rod, and the outer end of the lifting bracket is slidably connected to the lower end of the drive rack. The drive rack and the lifting bracket are connected to each other by a contact spring.

[0016] Preferably, the disconnection assembly includes a drive gear, which is fixedly installed on the right end of the guide screws on both the front and rear sides. The drive gear is meshed with the upper inner wall of the drive rack, and the drive gear drives the guide screws to rotate, so that the threaded guide slider and the disconnection partition slide to the left end of the input socket, thereby separating the input socket from the plug of the internal wiring harness.

[0017] Preferably, the flow guiding component includes an external exhaust window, which is located inside the rear right end of the charger body. An exhaust fan module is fixedly installed on the left end of the external exhaust window, and a flow guiding window is located inside the rear left end of the charger body. The external exhaust window and the flow guiding window are distributed in a one-to-one correspondence.

[0018] Preferably, the flow guiding component includes flow guiding vertical grooves, which are equally spaced inside the flow guiding frame. The flow guiding vertical grooves are distributed correspondingly to the flow guiding window at the left end. Furthermore, a flow blocking baffle is rotatably installed inside the flow guiding vertical groove via a bearing. In the initial state, the flow blocking baffle seals the flow guiding vertical groove, preventing external dust from entering the interior of the charger body and affecting the normal operation of the charging components.

[0019] Preferably, the flow guiding component includes a transmission gear, which is fixedly installed on the upper end of the flow-blocking baffle outside the flow guiding frame. The left end of the transmission gear is meshed with a transmission rack, and the front end of the transmission rack is fixedly connected to a transmission slide, which elastically slides on the left end inside the charger body.

[0020] Preferably, the flow guiding component includes a driving ramp, which is fixedly installed on the guide slider at the rear end of the disconnected partition. The back of the driving ramp slides against the inclined surface of the transmission ramp, and the transmission ramp is fixedly connected to the front end of the transmission slide. The disconnected partition drives the driving ramp to slide to the left, and the inclined surface squeezes the transmission ramp and the transmission slide to slide backward to achieve flow obstruction opening and closing.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: This protective charger for lithium batteries achieves normal heat exchange through the exhaust fan module inside the charger body, and in cases of abnormally high temperatures, the thermal memory metal sheet drives the disconnection partition to slide, separating the power terminal inside the input socket and fully opening the guide groove, thus achieving an optimal balance between safety protection and heat dissipation performance. The specific details are as follows:

[0022] 1. The airflow guide window and the external exhaust window form a directional airflow channel inside the charger body. Combined with the negative pressure suction of the exhaust fan module, efficient heat exchange is achieved. The exhaust fan module continuously forces the hot air accumulated inside the charger body to be discharged through the external exhaust window. At the same time, the airflow guide window simultaneously draws in external cold air, forming a stable convection circulation. This causes the internal temperature of the charger body to drop evenly, avoiding local overheating that could lead to aging of electronic components and significantly extending the service life of the charging components.

[0023] 2. The thermal memory metal sheet is tightly attached to the outer wall of the input socket, absorbing abnormal temperature rise inside the charger body in real time. When the temperature exceeds the critical value, the thermal memory metal sheet undergoes directional deformation, which drives the drive rack to move linearly through the lifting bracket. The drive rack meshes and drives the drive gear to rotate, which in turn drives the guide screw to rotate, causing the threaded guide slider to slide to the left along the guide groove. Finally, the disconnection partition forces the connector plug of the input socket to be pushed out and separated.

[0024] 3. The pre-compression force of the contact spring is the maximum deformation reaction force under normal heat dissipation conditions. Only when the abnormal high temperature causes the deformation of the thermal memory metal sheet to exceed the threshold can the contact spring be fully compressed and the rack be driven to move. This effectively filters out false actions caused by ambient temperature fluctuations, accurately distinguishes between normal heat dissipation and dangerous overheating conditions, and greatly improves the accuracy of power failure protection.

[0025] 4. The flow-blocking baffle is installed inside the flow-guiding vertical groove via a rotating shaft. Under normal conditions, it closes the flow-guiding vertical groove channel, preventing external dust from entering the charger body. When the disconnection baffle slides to the left to trigger power-off, the drive inclined block fixed to the guide slider moves synchronously. Its inclined surface squeezes the transmission inclined block, pushing the transmission slide backward, so that the flow-blocking baffle fully opens the flow-guiding vertical groove. During high-temperature power-off, the air intake cross-section is increased simultaneously, achieving the optimal balance between safety protection and heat dissipation performance. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the external exhaust window of the present invention;

[0028] Figure 3 This is a schematic diagram of the installation structure of the exhaust fan module of the present invention;

[0029] Figure 4 This is a three-dimensional structural diagram of the input socket of the present invention;

[0030] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0031] Figure 6 This is a schematic diagram of the structure of the airflow guiding window in this invention;

[0032] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B;

[0033] Figure 8 This is a schematic diagram of the flow guide frame installation structure of the present invention;

[0034] Figure 9 This is a schematic diagram of the three-dimensional structure of the disconnected partition plate of the present invention;

[0035] Figure 10 For the present invention Figure 9 Enlarged structural diagram at point C;

[0036] Figure 11 For the present invention Figure 9 Enlarged structural diagram at point D.

[0037] In the diagram: 1. Charger body; 2. Power supply harness; 3. Input socket; 4. Disconnection partition; 5. Thermal memory metal sheet; 6. Flow guide window; 7. Flow guide bracket; 8. Electrical connection metal strip; 9. Guide groove; 10. Guide screw; 11. Guide slider; 12. Positioning bracket; 13. Limiting frame; 14. Guide slide rod; 15. Lifting bracket; 16. Drive rack; 17. Contact spring; 18. Drive gear; 19. External exhaust window; 20. Exhaust fan module; 21. Flow guide vertical groove; 22. Flow barrier partition; 23. Transmission gear; 24. Transmission rack; 25. Transmission slide; 26. Drive wedge block; 27. Transmission wedge block. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figures 1-11 The present invention provides the following technical solution:

[0040] Example 1: To address the problems existing in the actual use of current lithium battery chargers, this example discloses the following technical solution: a protective charger for lithium batteries, comprising a charger body 1, a power supply harness 2 for supplying power to the lithium battery on the right end of the charger body 1, and an input socket 3 connected to the power supply on the left end of the charger body 1; the input socket 3 is fixedly installed inside the front of the left end of the charger body 1, and the input socket 3 is connected to the charging components inside the charger body 1, and a power-connecting metal strip 8 is fixedly installed inside the input socket 3, and the power-connecting metal strip 8 inside the input socket 3 is plugged into the power supply harness to achieve power input operation.

[0041] The charger body 1 has a current guiding component inside, and the current guiding component includes a current guiding window 6, and a current guiding bracket 7 is provided at the right end of the current guiding window 6; the current guiding component includes an external exhaust window 19, and the external exhaust window 19 is opened at the rear inside the right end of the charger body 1, and an exhaust fan module 20 is fixedly installed at the left end of the external exhaust window 19, and the current guiding window 6 is opened at the rear inside the left end of the charger body 1, and the external exhaust window 19 and the current guiding window 6 are distributed one-to-one.

[0042] like Figures 1-3 As shown, when charging the lithium battery through the charger body 1, firstly, the power supply harness 2 on the right end of the charger body 1 is connected to the charging interface of the lithium battery. Then, the end cover of the input socket 3 on the left end of the charger body 1 is opened, and the end of the power supply harness is inserted into the inside of the input socket 3, so that the power supply metal strip 8 fixedly installed inside the input socket 3 is connected to the power supply harness. Then, the other end of the power supply harness is connected to the power supply socket so that the power is supplied to the lithium battery through the charging component inside the charger body 1.

[0043] Furthermore, the exhaust fan module 20 at the right end of the charger body 1 operates. The exhaust fan module 20 rotates in a negative pressure suction manner, thereby transporting the hot airflow inside the charger body 1 to the right-side exhaust window 19, and then transporting the hot airflow to the outside of the charger body 1 through the exhaust window 19. At the same time, when the airflow inside the charger body 1 is under negative pressure, the airflow guide window 6 opened at its left end draws the outside air into the interior of the charger body 1, thereby completing the heat dissipation and temperature control under normal conditions.

[0044] Example 2: To address the problems existing in the actual use of current lithium battery chargers, this example discloses the following technical solution: A disconnection assembly is provided inside the left end of the charger body 1, and the disconnection assembly includes a disconnection partition 4, which is slidably installed inside the input socket 3; wherein, the disconnection assembly includes a thermal memory metal sheet 5, which is attached to the outer right wall of the input socket 3 inside the charger body 1; the disconnection assembly includes a guide groove 9, which is opened on the front and rear sides inside the input socket 3 inside the charger body 1, and a guide screw 10 is rotatably installed inside the guide groove 9 through a bearing, and a guide slider 11 is threaded through the outer wall of the guide screw 10, while the guide slider 11 is fixedly installed outside the disconnection partition 4.

[0045] The disconnection assembly includes a positioning bracket 12, which is fixedly installed inside the left end of the charger body 1. Limiting frames 13 are fixedly installed on both the front and rear sides of the top face of the positioning bracket 12. The lower end of the thermal memory metal sheet 5 is fixedly connected to the inner bottom surface of the limiting frame 13, and the limiting frame 13 positions the thermal memory metal sheet 5. The disconnection assembly includes a guide slide rod 14, which is fixedly installed inside the limiting frame 13. A lifting bracket 15 is slidably connected to the outer wall of the guide slide rod 14. The outer end of the lifting bracket 15 is slidably connected to the lower end of the drive rack 16. The drive rack 16 and the lifting bracket 15 are connected to each other by a contact spring 17.

[0046] The disconnection assembly includes a drive gear 18, which is fixedly installed on the right end of the front and rear guide screws 10. The drive gear 18 is meshed with the upper inner wall of the drive rack 16. The drive gear 18 drives the guide screws 10 to rotate, causing the threaded guide slider 11 and the disconnection partition 4 to slide to the left end of the input socket 3, which is used to separate the input socket 3 from the plug of the internal wiring harness.

[0047] like Figures 4-7 As shown, when there is an abnormally high temperature inside the charger body 1, the high temperature of the charger body 1 is transmitted inside and absorbed by the thermal memory metal sheet 5 at the right end of the input socket 3. After the thermal memory metal sheet 5 is heated, it extends upward inside the limiting frame 13 and compresses the top-connected anti-spring 17. Under normal heating conditions, the extension of the thermal memory metal sheet 5 can be countered by the anti-spring 17.

[0048] Furthermore, under abnormally high temperatures, the thermal memory metal sheet 5 fully extends, causing it to compress the contact spring 17 and drive the lifting bracket 15 to move upward synchronously. The guide slide rod 14 limits the rise of the lifting bracket 15, thereby driving the upper drive rack 16 to move synchronously. The drive rack 16 drives the meshing drive gear 18 and guide screw 10 to rotate. The guide slider 11, which is threadedly connected to the guide screw 10, is limited by the disconnection partition 4, so that the rotating guide screw 10 drives the threaded guide slider 11 and the disconnection partition 4 to slide from right to left. When the disconnection partition 4 slides inside the input socket 3, it moves against the end of the plugged-in wiring harness, causing the end of the wiring harness to disconnect from the input socket 3, thereby achieving active power cut-off under abnormally high temperatures.

[0049] Example 3: In order to solve the problems existing in the actual use of existing lithium battery chargers, this example discloses the following technical solution: the flow guiding component includes a flow guiding vertical groove 21, and the flow guiding vertical groove 21 is equally spaced inside the flow guiding frame 7. The flow guiding vertical groove 21 is correspondingly distributed with the flow guiding window 6 at the left end. Moreover, the flow blocking baffle 22 is rotatably installed inside the flow guiding vertical groove 21 through a bearing. In the initial state, the flow blocking baffle 22 closes the flow guiding vertical groove 21 to prevent external dust from entering the interior of the charger body 1 and affecting the normal operation of the charging components.

[0050] The flow guiding assembly includes a transmission gear 23, which is fixedly installed on the upper end of the flow-blocking baffle 22 outside the flow guiding frame 7. The left end of the transmission gear 23 is meshed with a transmission rack 24, and the front end of the transmission rack 24 is fixedly connected to a transmission slide 25. The transmission slide 25 elastically slides on the left end inside the charger body 1. The flow guiding assembly includes a drive inclined block 26, which is fixedly installed on the guide slider 11 at the rear end of the disconnected baffle 4. The back of the drive inclined block 26 slides against the inclined surface of the transmission inclined block 27, and the transmission inclined block 27 is fixedly connected to the front end of the transmission slide 25. The disconnected baffle 4 drives the drive inclined block 26 to slide to the left. The inclined surface squeezes the transmission inclined block 27 and the transmission slide 25 to slide backward to achieve the flow blocking opening and closing.

[0051] like Figures 8-11As shown, when the disconnection partition 4 inside the input socket 3 slides, the guide slider 11 at the rear end of the disconnection partition 4 drives the fixedly connected drive inclined block 26 to slide. The drive inclined block 26 and the transmission inclined block 27 are in contact with each other through the rear inclined surface. When the drive inclined block 26 moves, it squeezes the transmission inclined block 27 to move backward, so that the transmission inclined block 27 drives the fixedly connected transmission slide 25 and transmission rack 24 to move. The rearward-moving transmission rack 24 drives the meshing transmission gear 23 to rotate. Thus, the transmission gear 23 drives the fixedly connected flow-blocking partition 22 to rotate inside the flow-guiding vertical groove 21 opened inside the flow-guiding frame 7. Thus, under high temperature conditions, the rotation of the flow-blocking partition 22 fully opens the flow-guiding vertical groove 21, so as to improve the heat exchange effect inside the charger body 1 under abnormal high temperature conditions. Together with the disconnection partition 4, the wiring harness is disconnected, thereby improving the protection effect.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A protective charger for lithium batteries, comprising a charger body (1), wherein a power supply harness (2) for supplying power to the lithium battery is provided at the right end of the charger body (1), and an input socket (3) for interconnection with the power supply is provided at the left end of the charger body (1). Its features are, Also includes: The left end of the charger body (1) is provided with a disconnection component, and the disconnection component includes a disconnection partition (4), and the disconnection partition (4) is slidably installed inside the input socket (3). The disconnection component includes a thermal memory metal sheet (5), and the thermal memory metal sheet (5) is attached to the outer right wall of the input socket (3) inside the charger body (1). The charger body (1) is provided with a current guiding component inside, and the current guiding component includes a current guiding window (6), and a current guiding frame (7) is provided at the right end of the current guiding window (6).

2. A protective charger for lithium batteries according to claim 1, characterized in that: The input socket (3) is fixedly installed inside the front of the left end of the charger body (1), and the input socket (3) is connected to the charging component inside the charger body (1). A power-connecting metal strip (8) is fixedly installed inside the input socket (3), and the power-connecting metal strip (8) inside the input socket (3) is connected to the power-connecting wire harness to realize the power input operation.

3. A protective charger for lithium batteries according to claim 1, characterized in that: The disconnection assembly includes a guide groove (9), and the guide groove (9) is opened on the front and rear sides of the input socket (3) inside the charger body (1). The guide groove (9) is rotatably mounted with a guide screw (10) through a bearing. The guide screw (10) is threaded through the outer wall of the guide slider (11), and the guide slider (11) is fixedly installed on the outside of the disconnection partition (4).

4. A protective charger for lithium batteries according to claim 3, characterized in that: The disconnection assembly includes a positioning bracket (12), which is fixedly installed on the left side inside the charger body (1). Limiting frames (13) are fixedly installed on both the front and rear sides of the top of the positioning bracket (12). The lower end of the thermal memory metal sheet (5) is fixedly connected to the bottom surface inside the limiting frame (13), and the limiting frame (13) positions the thermal memory metal sheet (5).

5. A protective charger for lithium batteries according to claim 4, characterized in that: The disconnection assembly includes a guide slide rod (14), which is fixedly installed inside the limiting frame (13). The outer wall of the guide slide rod (14) is slidably connected to a lifting bracket (15), and the outer end of the lifting bracket (15) is slidably connected to the lower end of the drive rack (16). At the same time, the drive rack (16) and the lifting bracket (15) are connected to each other by a contact spring (17).

6. A protective charger for lithium batteries according to claim 5, characterized in that: The disconnection assembly includes a drive gear (18), which is fixedly installed on the right end of the front and rear guide screws (10). The drive gear (18) is meshed with the upper inner wall of the drive rack (16). The drive gear (18) drives the guide screws (10) to rotate, so that the threaded guide slider (11) and the disconnection partition (4) slide to the left end of the input socket (3) to separate the input socket (3) from the plug of the internal wiring harness.

7. A protective charger for lithium batteries according to claim 1, characterized in that: The flow guiding component includes an external exhaust window (19), which is located inside the rear of the right end of the charger body (1). An exhaust fan module (20) is fixedly installed on the left end of the external exhaust window (19), and a flow guiding window (6) is located inside the rear of the left end of the charger body (1). The external exhaust window (19) and the flow guiding window (6) are distributed in a one-to-one correspondence.

8. A protective charger for lithium batteries according to claim 7, characterized in that: The flow guiding component includes a flow guiding vertical groove (21), and the flow guiding vertical groove (21) is equally spaced inside the flow guiding frame (7). The flow guiding vertical groove (21) is correspondingly distributed with the flow guiding window (6) at the left end. The flow guiding vertical groove (21) is rotatably installed with a flow blocking baffle (22) through a bearing. In the initial state, the flow blocking baffle (22) closes the flow guiding vertical groove (21) to prevent external dust from entering the interior of the charger body (1) and affecting the normal operation of the charging components.

9. A protective charger for lithium batteries according to claim 8, characterized in that: The flow guiding component includes a transmission gear (23), and the transmission gear (23) is fixedly installed on the upper end of the external flow blocking baffle (22) of the flow guiding frame (7). The left end of the transmission gear (23) is meshed with a transmission rack (24), and the front end of the transmission rack (24) is fixedly connected with a transmission slide (25). Meanwhile, the transmission slide (25) elastically slides on the inner left end of the charger body (1).

10. A protective charger for lithium batteries according to claim 9, characterized in that: The flow guiding component includes a driving inclined block (26), and the driving inclined block (26) is fixedly installed on the guide slider (11) at the rear end of the disconnected partition (4). The back of the driving inclined block (26) slides against the inclined surface of the transmission inclined block (27), and the transmission inclined block (27) is fixedly connected to the front end of the transmission slide (25). The driving inclined block (26) is driven to slide to the left by the disconnected partition (4). The flow obstruction opening and closing is achieved by the inclined surface squeezing the transmission inclined block (27) and the transmission slide (25) to slide backward.

Images