Bullet train heating device capable of exhausting air laterally

By introducing filter boxes and heating parts into the EMU heating device to process and heat the air, the pollution and efficiency problems caused by untreated cold air are solved, and higher comfort and service life are achieved.

CN119872623AActive Publication Date: 2025-04-25JIANGSU JIUZHOU ELECTRIC APPLIANCE CO LTD
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Patent Information

Application Number
CN202510076857.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-17
Publication Date
2025-04-25
Estimated Expiration
2045-01-17

AI Technical Summary

Technical Problem

During the heating process of the existing EMU heating devices, untreated cold air enters the car, causing external pollutants to enter the car, affecting the air quality, and requiring more heating energy, reducing heating efficiency and service life.

Method used

A lateral exhaust EMU heating device is designed, including a heating box and a filter box. The filter particles in the filter box treat impurities in the air to improve the air quality; the gases after heating the heating parts can be heated to improve the heating efficiency.

Benefits of technology

By filtering and heating the air, the comfort inside the car is improved, the burden on the heating system is reduced, the service life is extended, and the overall energy utilization is improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a lateral exhaust bullet train heating device which comprises a heating box, a heating piece is installed in the heating box, and the output end of the heating piece is connected with a conveying piece. A filter box is installed in the heating box, a partition plate is installed in the filter box, a through hole is formed in the partition plate, the filter box is connected to a heating piece through a pipeline, input gas is treated through filter particles in the filter box, and a filter assembly is installed at the side end of the heating box. The filtering assembly comprises a water storage tank installed at the side end of the heating box. According to the motor car heating device capable of exhausting air laterally, impurities in air are filtered through filtering particles in a filtering box, so that external air is treated, later heating operation is facilitated, conveyed air is heated through a heating piece and is conveniently conveyed into a compartment of a motor car to be used, the comfort degree of the interior of the compartment is improved, and the service life of the motor car is prolonged. The overall heating burden is reduced, and the overall service life is prolonged.
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Description

Technical Field

[0001] The present invention relates to the technical field related to motor vehicle heating, and in particular to a motor vehicle heating device with side exhaust. Background Art

[0002] With the adjustment and development of China's railways, the requirements for comfort in the EMU carriages are getting higher and higher. Therefore, it is necessary to heat the carriages to improve their comfort. However, the existing EMU heating devices still have certain defects when used, such as; During use, most existing heating devices are electric heaters, which have the problem of uneven transmission, which easily leads to low overall heating efficiency and relatively large overall loss, which easily leads to reduced overall energy utilization; In order to overcome the above defects, prior art 1 (Chinese patent with application number 201721042525.7 and application date 2017-08-18) is an electric heater for a motor vehicle or a motor vehicle, comprising an electric heating tube and a shell assembly, wherein the heating tube is accommodated in the shell assembly, wherein the shell assembly comprises a shell and a cover plate connected together, wherein the cover plate is located at the front of the electric heater, wherein the shell comprises a back plate, a top plate, a bottom plate and a side plate connected to each other as a whole, wherein the cover plate is arranged in parallel with the back plate, wherein the cover plate has multiple rows of heat dissipation ports, wherein the heat dissipation performance of the radiator is good, the heat dissipation rate is high, the energy utilization rate is improved, and the energy loss is reduced; There is also prior art 2 (Chinese patent with application number 202121835815.3 and application date 2021-08-05). A new type of air vent for a high-cold motor vehicle comprises an outdoor air inlet window, an outdoor air exhaust window, an indoor air inlet window and an indoor air exhaust window fixed to the motor vehicle compartment, wherein the outdoor air inlet window is arranged on the roof of the motor vehicle and close to one end of the forward direction, and the outdoor air exhaust window is arranged in the motor vehicle compartment and close to the rear of the vehicle. By arranging air inlet and outlet ducts for heat exchange, the hot air to be discharged from the compartment can heat the cold air to be entered into the compartment, thereby reducing the heat loss in the compartment, reducing the energy loss of the motor vehicle traveling in the high-cold zone, and improving the energy utilization rate; by reasonably arranging the positions of the various air inlets and outlets on the motor vehicle compartment, the ventilation system of the compartment can work normally without the air pump doing any work, further reducing the energy damage during the travel of the motor vehicle, which is very energy-saving and environmentally friendly; And prior art 3 (Chinese patent with application number 202210004435.8 and application date 2022-01-04) a heating system and a vehicle, the heating system is used for a vehicle, the vehicle includes a driving area and a rest area, the heating system has an air supply channel, the air supply channel has an air inlet end and an air outlet end, the air outlet end is provided with multiple air outlets, and the multiple air outlets are respectively located in the driving area and the rest area, the heating system includes an air supply device and a heating device, the air supply device has an air supply outlet, the air supply outlet is connected to the air inlet end of the air supply channel, the air supply device is used to supply air to the air supply channel so that the air outlet discharges air, the heating device is provided at the air inlet end of the air supply channel, and is used to heat the air sent by the air supply device to the air supply channel. The heating system can solve the problem that the temperature rise of the current parking heating scheme is uneven and it is difficult to meet the overall heating needs in the vehicle.

[0003] Although the existing technology can provide air supply heating, during the working process, the cold air around the vehicle is transported and heated by a heating device for heating. Since the overall inhaled air is not treated, it is easy for pollutants in the external environment to enter the vehicle through the heating pipe, thereby affecting the air quality in the vehicle. In addition, heating the cold air that has not been pre-treated requires more heating energy to increase the temperature, which not only increases the burden on the heating system and reduces the overall service life, but also reduces the heating efficiency and affects the comfort in the vehicle.

[0004] In view of the above problems, it is urgently necessary to carry out innovative design based on the original side exhaust EMU heating device. Therefore, we proposed a side exhaust EMU heating device which can well solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a motor vehicle heating device with side exhaust to solve the problem proposed by the above-mentioned background technology that the heating operation is currently carried out on the market by transporting cold air around the vehicle and heating it with a heating device. Since the overall inhaled air is not treated, it is easy for pollutants in the external environment to enter the vehicle through the heating pipe, thereby affecting the air quality in the vehicle. In addition, heating the untreated cold air requires more heating energy to increase the temperature, which not only increases the burden on the heating system and reduces the overall service life, but also reduces the heating efficiency and affects the comfort in the vehicle.

[0006] To achieve the above object, the present invention provides the following technical solution: a motor vehicle heating device with side exhaust, comprising a heating box, a heating element is installed inside the heating box, and a conveying element is connected to the output end of the heating element; A filter box is installed inside the heating box, a partition is installed inside the filter box, a through hole is opened on the partition, and the filter box is connected to the heating element through a pipeline, and the input gas is processed by filtering particles inside the filter box.

[0007] Preferably, a filter assembly is installed on the side end of the heating box, and the filter assembly includes a water storage tank installed on the side end of the heating box, the water storage tank is connected to the inside of the filter box through a delivery pipe, an auxiliary box is installed on the outside of the delivery pipe, a lifting rod is installed inside the auxiliary box, a first through groove is opened on the lifting rod, and a delivery groove is opened inside the delivery pipe.

[0008] Preferably, an auxiliary pipeline is installed inside the filter box, a cotton strip is arranged inside the auxiliary pipeline, and a valve is installed at the bottom of the filter box.

[0009] Preferably, a processing piece is installed inside the auxiliary box, a first magnetic block is installed under the processing piece, the first magnetic block is matched with the second magnetic block, the second magnetic block is installed on the lifting rod, and a first spring is arranged on the outer side of the lifting rod.

[0010] Preferably, a buffer assembly is provided under the heating element, and the buffer assembly includes a support plate installed at the bottom of the heating element, a support seat is installed under the support plate, the support seat is connected to the inside of a storage seat, the storage seat is installed inside the heating box, a pressure rod is installed at the bottom of the support seat, and the bottom of the pressure rod is connected to the inside of the storage seat through a buffer column.

[0011] Preferably, a storage box is installed at the side end of the heating box, a dehumidification box is arranged inside the storage box, and a partition net is arranged on the pipe running through the inside of the dehumidification box.

[0012] Preferably, an auxiliary component is installed on the side end of the dehumidification box, and the auxiliary component includes a dual-axis motor installed on the side end of the dehumidification box, the output end of the dual-axis motor is connected to a stirring member, and the stirring member is located inside the dehumidification box, and the output end of the dual-axis motor is connected to an eccentric wheel, and the eccentric wheel contacts with the lifting member after rotation, and a striking plate is installed on the lifting member.

[0013] Preferably, an exhaust duct is installed at the side end of the dehumidification box, a dustproof component is arranged inside the exhaust duct, and the dustproof component includes a first limiting plate installed inside the exhaust duct, and a second through groove is opened on the first limiting plate.

[0014] Preferably, a second limiting plate is installed at the side end of the first limiting plate, a conveying hole is opened on the second limiting plate, an I-shaped piece is connected through the second limiting plate, the end of the I-shaped piece is adapted to the second through groove, and a second spring is sleeved on the outer side of the I-shaped piece.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the side-exhaust motor vehicle heating device uses the filter particles inside the filter box to filter the impurities in the air, so that the external air is processed, which is convenient for the subsequent heating operation. The transported gas is heated by the heating element and is conveniently transported to the inside of the motor vehicle compartment for use, thereby improving the comfort inside the compartment, reducing the overall heating burden, and increasing the overall service life. The specific contents are as follows: (1) The filter particles inside the filter box filter out impurities in the air, and the filter assembly soaks the filter particles inside the filter box, thereby improving the overall filtering efficiency. The filtered gas is heated by the heating element and is conveniently transported to the interior of the train compartment for use; (2) The second magnetic block on the top of the lifting rod cooperates with the first magnetic block, so that the liquid inside the water tank is transmitted to the inside of the filter box through the delivery pipe, thereby improving the overall filtration efficiency. The lifting rod is lifted and lowered by the cooperation of the first spring, and the whole is suitable for different situations, thereby improving the overall applicability; (3) The heating element is supported by the support plate of the buffer assembly and moves inside the storage seat through the support seat, so that the buffer column and the pressure rod inside the storage seat perform a buffering operation, thereby improving the overall stability and reducing the damage caused by external forces inside the heating box; (4) The dual-axis motor of the auxiliary component drives the transmission element inside the storage box to transmit, and performs dehumidification operation through the dehumidification particles inside the dehumidification box. The dual-axis motor not only drives the transmission element to transmit, but also conveniently drives the stirring element to stir inside the dehumidification box, thereby improving the overall dehumidification efficiency; (5) The transported gas is transmitted through the second through groove and the transport hole of the dustproof component, and the I-shaped part penetrating the second limiting plate is stably limited by the cooperation of the second spring, thereby reducing the damage caused by the backflow of external air through the exhaust duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a side view structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the internal structure of the heating box of the present invention; Figure 4 This is a schematic diagram of the internal structure of the filter box of the present invention; Figure 5 It is a schematic diagram of the structure of the first magnetic block and the second magnetic block of the present invention; Figure 6 This is a schematic diagram of the connection structure between the support plate and the support seat of the present invention; Figure 7 This is a schematic diagram of the internal structure of the storage seat of the present invention; Figure 8 This is a schematic diagram of the internal structure of the storage box of the present invention; Fig. 9 It is a schematic diagram of the connection structure between the lifting member and the striking plate of the present invention; Fig.10 It is a schematic diagram of the internal structure of the exhaust pipe of the present invention.

[0017] In the figure: 1. heating box; 2. filter box; 3. partition; 4. through hole; 5. heating element; 6. conveying element; 7. water storage tank; 8. conveying pipeline; 9. auxiliary box; 10. lifting rod; 11. first through slot; 12. conveying slot; 13. auxiliary pipeline; 14. cotton strip; 15. valve; 16. processing element; 17. first magnetic block; 18. second magnetic block; 19. first spring; 20. support plate; 21. support seat; 22. storage seat; 23. buffer column; 24. pressure rod; 25. dual-axis motor; 26. storage box; 27. dehumidification box; 28. partition; 29. ​​exhaust pipeline; 30. stirring element; 31. eccentric wheel; 32. lifting element; 33. striking plate; 34. first limit plate; 35. second through slot; 36. second limit plate; 37. conveying hole; 38. I-shaped element; 39. second spring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: In this embodiment, in order to improve the comfort level inside the vehicle compartment, a filter assembly is provided to reduce the problem of directly heating the outside air and causing a decrease in comfort level. Figure 1-Figure 5The technical solution shown includes a heating box 1, a heating element 5 is installed inside the heating box 1, a conveying element 6 is connected to the output end of the heating element 5, a filter box 2 is installed inside the heating box 1, a partition 3 is installed inside the filter box 2, a through hole 4 is provided on the partition 3, the filter box 2 is connected to the heating element 5 through a pipeline, and the input gas is processed by filtering particles inside the filter box 2, a filter assembly is installed at the side end of the heating box 1, the filter assembly includes a water storage tank 7 installed at the side end of the heating box 1, the water storage tank 7 is connected to the inside of the filter box 2 through a conveying pipe 8, an auxiliary box 9 is installed outside the conveying pipe 8, a lifting rod 10 is installed inside the auxiliary box 9, a first through groove 11 is penetrated on the lifting rod 10, a conveying groove 12 is provided inside the conveying pipe 8, the heating box 1 is convenient for limited installation, at this time, the external air is introduced into the filter box 2, and the filter particles inside the filter box 2 are used to filter the impurities in the air, so that the external air is processed , it is convenient for later heating operations, and reduces the problem of inconvenience in later transportation caused by directly heating external air. The clean air treated with filter particles is conveniently transported through the through holes 4 on the partition 3, and the transported gas is heated by the heating element 5, and the heated air is transmitted through the conveying element 6, so that the overall transportation efficiency is greatly improved, and it is convenient to transport it to the interior of the motor vehicle compartment for use, which improves the comfort inside the compartment, reduces the overall heating burden, and increases the overall service life. The liquid inside the water tank 7 is transmitted to the inside of the filter box 2 through the conveying pipe 8, so it is convenient to soak the filter particles inside the filter box 2, thereby improving the overall filtration efficiency, and the lifting rod 10 inside the auxiliary box 9 can control the connectivity between the first through groove 11 and the conveying groove 12, so as to facilitate the transportation of the liquid inside the water tank 7, and the overall operation and use are convenient, reducing the problem of increased costs due to frequent maintenance.

[0020] Embodiment 2: In this embodiment, in order to improve the overall service life, a buffer component is provided for use, the purpose of which is to reduce the damage caused by external forces inside the heating box 1. Figure 4-Figure 7As shown, an auxiliary pipe 13 is installed inside the filter box 2, a cotton strip 14 is arranged inside the auxiliary pipe 13, a valve 15 is installed at the bottom of the filter box 2, a processing part 16 is installed inside the auxiliary box 9, a first magnetic block 17 is installed under the processing part 16, the first magnetic block 17 is adapted to the second magnetic block 18, the second magnetic block 18 is installed on the lifting rod 10, a first spring 19 is arranged on the outside of the lifting rod 10, a buffer assembly is arranged under the heating element 5, the buffer assembly includes a support plate 20 installed at the bottom of the heating element 5, a support seat 21 is installed under the support plate 20, the support seat 21 is connected to the inside of the storage seat 22, and the storage seat 22 It is installed inside the heating box 1, and a pressure rod 24 is installed at the bottom of the support seat 21. The bottom of the pressure rod 24 is connected to the inside of the storage seat 22 through a buffer column 23. The liquid transmitted by the delivery pipe 8 is adsorbed by the cotton strip 14 inside the auxiliary pipe 13, which not only reduces the inconvenience caused by the large amount of liquid inside the filter box 2, but also uses the cotton strip 14 to wet the filter particles inside the filter box 2, thereby improving the overall filtration efficiency. The valve 15 set at the bottom of the filter box 2 is convenient for discharging sewage, thereby improving the overall service life. It is connected to the first magnetic block 17 through the processing unit 16 for use, and can be used through the first magnetic block 17 The position of the lifting rod 10 is adjusted according to the disconnection situation. The second magnetic block 18 on the top of the lifting rod 10 cooperates with the first magnetic block 17 to facilitate the lifting of the lifting rod 10 in the auxiliary box 9, so that the liquid in the water storage tank 7 is transmitted to the inside of the filter box 2 through the delivery pipe 8, thereby improving the overall filtration efficiency. Moreover, the first magnetic block 17 and the second magnetic block 18 can cooperate to make the first through groove 11 and the delivery groove 12 connected for use, turn on the water pump in the water storage tank 7, and deliver the liquid to the inside of the filter box 2, so that the filter particles in the filter box 2 can be cleaned, thereby improving the overall service life, and can be processed Component 16 cancels the magnetic force on the first magnetic block 17, so that the lifting rod 10 can be lifted and lowered by the cooperation of the first spring 19, so that the liquid delivery can be driven by the shaking of the train during its movement. The whole is suitable for different situations and improves the overall applicability. When the train is moving, the heating component 5 is supported by the support plate 20 and moves inside the storage seat 22 through the support seat 21, so that the buffer column 23 and the pressure rod 24 inside the storage seat 22 perform a buffering operation, which improves the overall stability and reduces the damage caused by external forces inside the heating box 1, thereby greatly improving the overall service life.

[0021] Embodiment three: In this embodiment, in order to improve the overall applicability, the auxiliary components are used to reduce the problem of uncomfortable breathing caused by high humidity in the gas. Figure 8-Figure 10As shown, a storage box 26 is installed at the side end of the heating box 1, a dehumidification box 27 is arranged inside the storage box 26, a partition 28 is arranged on the pipe running through the inside of the dehumidification box 27, an auxiliary component is installed at the side end of the dehumidification box 27, the auxiliary component includes a double-axis motor 25 installed at the side end of the dehumidification box 27, a stirring member 30 is connected to the output end of the double-axis motor 25, the stirring member 30 is located inside the dehumidification box 27, an eccentric wheel 31 is connected to the output end of the double-axis motor 25, the eccentric wheel 31 contacts with the lifting member 32 after rotation, the lifting member 32 is installed with a striking plate 33, an exhaust pipe 29 is installed at the side end of the dehumidification box 27, and the exhaust pipe A dustproof component is provided inside the exhaust duct 29, and the dustproof component includes a first limit plate 34 installed inside the exhaust duct 29, a second through slot 35 is provided on the first limit plate 34, a second limit plate 36 is installed on the side end of the first limit plate 34, a conveying hole 37 is provided on the second limit plate 36, and a profiled piece 38 is connected through the second limit plate 36, the end of the profiled piece 38 is adapted to the second through slot 35, and a second spring 39 is sleeved on the outer side of the profiled piece 38, and the transmission piece inside the storage box 26 is driven by the dual-axis motor 25 to transmit, so that the gas conveyed by the conveying piece 6 is transmitted to the dehumidification box 27 through the transmission piece. The dehumidification operation is performed inside the dehumidification box 27 through the dehumidification particles inside the dehumidification box 27, reducing the inconvenience of transporting the gas to the interior of the car due to the high humidity in the gas. The dual-axis motor 25 not only drives the transmission member to transmit, but also drives the stirring member 30 to stir inside the dehumidification box 27 through the dual-axis motor 25, thereby improving the overall dehumidification efficiency. The output end of the dual-axis motor 25 drives the eccentric wheel 31 to rotate. When the eccentric wheel 31 contacts the lifting member 32, the lifting member 32 rises, causing the striking plate 33 to strike the transmission pipeline, thereby reducing the dehumidification particles inside the dehumidification box 27 adhering to the partition net 28 and causing the gas transmission to In order to solve the problem of reduced efficiency, the dehumidified gas is transported to the side ends of the seats in the carriage through the exhaust duct 29, so that the overall heating is more uniform and the overall comfort of the carriage is improved. In addition, since the exhaust duct 29 is provided with a first limiting plate 34 and a second limiting plate 36, the transported gas is transmitted through the second through groove 35 and the transport hole 37, and the I-shaped piece 38 passing through the second limiting plate 36 is stably limited by the cooperation of the second spring 39, which not only reduces the damage caused by the backflow of external air through the exhaust duct 29, but also reduces the problem of external impurities affecting the cleanliness of the inside of the exhaust duct 29.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A motor vehicle heating device with side exhaust, comprising a heating box (1), a heating element (5) installed inside the heating box (1), and a conveying element (6) connected to an output end of the heating element (5); It is characterized in that Also includes: A filter box (2) is installed inside the heating box (1), a partition (3) is installed inside the filter box (2), a through hole (4) is provided on the partition (3), the filter box (2) is connected to the heating element (5) via a pipeline, and the input gas is processed by filtering particles inside the filter box (2).

2. A motor vehicle heating device with side exhaust according to claim 1, characterized in that: A filter assembly is installed at the side end of the heating box (1), and the filter assembly includes a water storage tank (7) installed at the side end of the heating box (1); the water storage tank (7) is connected to the inside of the filter box (2) via a delivery pipe (8); an auxiliary box (9) is installed outside the delivery pipe (8); a lifting rod (10) is installed inside the auxiliary box (9); a first through groove (11) is opened through the lifting rod (10); and a delivery groove (12) is opened inside the delivery pipe (8).

3. The side exhaust motor vehicle heating device according to claim 1, characterized in that: An auxiliary pipeline (13) is installed inside the filter box (2), a cotton strip (14) is arranged inside the auxiliary pipeline (13), and a valve (15) is installed at the bottom of the filter box (2).

4. The side exhaust motor vehicle heating device according to claim 2 is characterized in that: A processing element (16) is installed inside the auxiliary box (9), a first magnetic block (17) is installed under the processing element (16), the first magnetic block (17) is matched with a second magnetic block (18), the second magnetic block (18) is installed on the lifting rod (10), and a first spring (19) is arranged on the outside of the lifting rod (10).

5. The side exhaust motor vehicle heating device according to claim 1, characterized in that: A buffer assembly is provided under the heating element (5), the buffer assembly comprising a support plate (20) mounted at the bottom of the heating element (5), a support seat (21) being mounted under the support plate (20), the support seat (21) being connected through the inside of a storage seat (22), the storage seat (22) being mounted inside the heating box (1), a pressure rod (24) being mounted at the bottom of the support seat (21), the bottom of the pressure rod (24) being connected to the inside of the storage seat (22) via a buffer column (23).

6. The side exhaust motor vehicle heating device according to claim 1 is characterized in that: A storage box (26) is installed at the side end of the heating box (1), a dehumidification box (27) is arranged inside the storage box (26), and a partition net (28) is arranged on a pipe running through the inside of the dehumidification box (27).

7. The motor vehicle heating device with side exhaust according to claim 6 is characterized in that: An auxiliary component is installed at the side end of the dehumidification box (27), and the auxiliary component includes a double-axis motor (25) installed at the side end of the dehumidification box (27). The output end of the double-axis motor (25) is connected to a stirring member (30), and the stirring member (30) is located inside the dehumidification box (27). The output end of the double-axis motor (25) is connected to an eccentric wheel (31), and the eccentric wheel (31) contacts the lifting member (32) after rotation, and the lifting member (32) is installed with a striking plate (33).

8. The side exhaust motor vehicle heating device according to claim 6 is characterized in that: An exhaust duct (29) is installed at the side end of the dehumidification box (27), and a dustproof component is arranged inside the exhaust duct (29). The dustproof component includes a first limit plate (34) installed inside the exhaust duct (29), and a second through groove (35) is formed on the first limit plate (34).

9. The motor vehicle heating device with side exhaust according to claim 8, characterized in that: A second limiting plate (36) is mounted on the side end of the first limiting plate (34), a conveying hole (37) is formed on the second limiting plate (36), an I-shaped piece (38) is connected through the second limiting plate (36), an end of the I-shaped piece (38) is matched with the second through groove (35), and a second spring (39) is sleeved on the outer side of the I-shaped piece (38).

Citation Information

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