A constant temperature cabinet for biological culture and its matching support plate

Abstract

The present invention relates to the technical field of experimental instruments, and specifically to a constant temperature cabinet for biological culture and its matching pallet, comprising a constant temperature cabinet body, a pallet edge and a charging contact rod, wherein the inner wall surface of the constant temperature cabinet body is fixedly provided with a pallet edge and a charging contact rod, wherein the charging contact rod corresponds to the position of the pallet edge, and the pallet comprises a pallet outer frame, a supporting chamber, a charging jack and a battery pack; the constant temperature cabinet and its matching pallet of the present invention can automatically charge the pallet when the pallet is placed in the constant temperature cabinet, and the temperature is controlled by the constant temperature cabinet at this time; and when the pallet is taken out, the temperature of the culture dish is controlled and kept warm by the cooperation of the battery pack, the heat preservation heating ring and other structures.

Description

Technical Field

[0001] The invention relates to the technical field of experimental instruments, in particular to a constant temperature cabinet for biological culture and a matching support plate thereof. Background Art

[0002] In the process of conducting experiments such as microbial culture, in order to ensure the temperature required for the growth of microorganisms, it is usually necessary to place the culture dish in a constant temperature environment; and the constant temperature cabinet is a temperature control cabinet for controlling the temperature of the placement environment of the culture dish. The constant temperature cabinet under the prior art is, for example, an electric constant temperature incubator with a publication number of CN202131310U, which records: the culture cabinet and the control box fixed to the upper end of the culture cabinet and connected thereto, and there are also ventilation holes on the side walls of the culture cabinet. In this step, the culture cabinet has ventilation holes for air exchange, and the exhaust gas generated in the culture cabinet is dispersed by the ventilation holes, so that the air environment in the culture cabinet tends to be stable; the culture cabinet also includes a cabinet door hinged on the side of the culture cabinet, a heater laid at the bottom of the cabinet, and a partition stuck in the culture cabinet for placing the culture dish. In this step, the heater is laid at the bottom of the culture cabinet for heating in the incubator, and the partition is a partition with holes, and the gas and heat can circulate through the holes of each class, so that the heat and gas inside the culture cabinet can reach the entire space more evenly.

[0003] For example, the above-mentioned document records that when the constant temperature cabinet in the prior art is in use, when the tray is taken out of the constant temperature cabinet, the culture dish on the tray will cool down rapidly. In some experimental scenarios where frequent addition of reagents is required, frequent removal of the tray will cause the temperature of the culture dish to fluctuate frequently, which will have a great impact on the cultivation of microorganisms. Summary of the invention

[0004] The object of the present invention is to provide a constant temperature cabinet for biological culture and a supporting plate thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a constant temperature cabinet for biological culture, comprising a constant temperature cabinet body, a support plate edge and a charging contact rod, wherein the inner wall surface of the constant temperature cabinet body is fixedly provided with a support plate edge and a charging contact rod, and the charging contact rod corresponds to the position of the support plate edge.

[0006] A support plate, which is used in conjunction with a constant temperature cabinet for biological culture, comprises a support plate outer frame, a support chamber, a charging socket and a battery pack, wherein the support chambers are fixedly arranged on both sides of the support plate outer frame, the support chambers are limitedly slidably matched with the support plate clamping edge, the charging socket is opened on the surface of the support chamber, and the battery pack is arranged inside the support chamber, a split frame plate is arranged on the inner side of the support plate outer frame, a culture slot is arranged on the split frame plate, a culture dish is arranged in the culture slot, a heat preservation heating ring and a heat conductive silicone ring are embedded and installed on the inner wall surface of the culture slot, the heat preservation heating ring conducts heat to the culture dish through the heat conductive silicone ring, and the battery pack is used to supply power to the heat preservation heating ring so that the heat preservation heating ring generates heat; when the support chamber is matched with the support plate clamping edge in place, the charging contact rod will be inserted into the charging socket to charge the battery pack, and during the charging process of the battery pack, the battery pack stops supplying power to the heat preservation heating ring, and a vibration mechanism with an automatic fixing function is arranged on the split frame plate.

[0007] The vibration mechanism includes a connecting spring piece, a motor support plate, a driving motor and an eccentric vibration wheel. The support plate outer frame and the split frame plate are supported and connected by the connecting spring piece. The motor support plate is fixedly provided at the center position of the split frame plate. The driving motor is fixedly provided on the motor support plate. The eccentric vibration wheel is fixedly provided on the rotating shaft of the driving motor. The driving motor drives the eccentric vibration wheel to rotate, thereby driving the split frame plate to vibrate.

[0008] An eccentric shaft is fixedly arranged on the eccentric vibration wheel, a conversion connecting rod is swingably connected to the eccentric shaft, and a connecting rod rotating seat is swingably connected to the other end of the conversion connecting rod.

[0009] A fixed air cylinder is fixedly arranged on the surface of the split frame plate, a piston body is airtightly and slidably arranged in the fixed air cylinder, and the connecting rod swivel seat is fixedly installed with the piston body.

[0010] The end of the fixed air cylinder is connected and embedded with a one-way exhaust valve and a one-way intake valve, and the one-way intake valve is connected to an intake pipe. The one-way exhaust valve allows the airflow in the fixed air cylinder to flow to the outside in one direction, and the one-way intake valve allows the airflow in the intake pipe to flow into the fixed air cylinder in one direction.

[0011] The end of the intake pipe is connected to a pressure control pipe, an inner wall convex ring is fixedly provided on the inner wall surface of the pressure control pipe, a regulating plug is airtightly slidably inserted in the inner wall convex ring, a positioning ring portion is fixedly provided on the end of the regulating plug, a connecting groove is opened through the surface of the positioning ring portion inside and outside, the connecting groove is located on a side of the positioning ring portion close to the regulating plug, a tension spring is connected and fixed to the surface of the positioning ring portion away from the regulating plug, and the other end of the tension spring is fixedly connected to the inner wall surface of the pressure control pipe.

[0012] An air inlet hole is penetrated through the surface of one end of the pressure control tube away from the air intake pipe, and a negative pressure connecting nozzle is provided on the outer surface of the pressure control tube. The connecting port between the negative pressure connecting nozzle and the pressure control tube is located between the air intake pipe and the inner wall convex ring, and a connecting hose is provided on the negative pressure connecting nozzle.

[0013] A negative pressure distribution chamber is provided in the support chamber, a rubber pad is fixed to the lower surface of the support chamber, an adsorption bottom hole is provided through the rubber pad and the bottom of the negative pressure distribution chamber, and the negative pressure connecting nozzle is connected to the adsorption bottom hole through a connecting hose and the negative pressure distribution chamber in turn.

[0014] A liquid crystal display screen and a control knob are installed on the surface of the supporting chamber. The liquid crystal display screen is used to display the working status of the supporting plate, and the control knob is used to control the supporting plate.

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

[0016] The constant temperature cabinet of the present invention and its matching pallet can automatically charge the pallet when the pallet is placed in the constant temperature cabinet, and the temperature is controlled by the constant temperature cabinet at this time; and when the pallet is taken out, the culture dish is temperature-controlled and insulated by the cooperation of the provided battery pack and the heat-insulating heating ring and other structures, so that in some culture scenarios where the pallet needs to be frequently taken out for addition, sampling and other operations, the temperature fluctuation can be reduced by the heat preservation of the pallet, which is beneficial to the culture of microorganisms.

[0017] By providing a vibration mechanism, the support plate can actively vibrate the culture dish to assist in mixing the reagents during the biological culture process, thereby reducing or avoiding the use of stirring rods and lowering the probability of the reagents being contaminated.

[0018] The vibration mechanism can automatically generate negative pressure during the vibration process through the coordination of the fixed air cylinder, pressure control tube and adsorption bottom hole, so that the supporting chamber and the outer frame of the pallet are adsorbed and fixed to the table top, thereby preventing the entire pallet from being moved due to the vibration during the vibration of the split frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a thermostatic cabinet of the present invention.

[0020] Figure 2 for Figure 1 A magnified schematic diagram of area A in the middle.

[0021] Figure 3 It is the front view of the thermostatic cabinet of the present invention.

[0022] Figure 4 It is a schematic diagram of a support plate of the present invention.

[0023] Figure 5This is a schematic diagram of the support plate of the present invention from another angle.

[0024] Figure 6 It is a three-dimensional half-section schematic diagram of the culture tank of the support plate of the present invention.

[0025] Figure 7 for Figure 6 Enlarged schematic diagram of area B in the middle.

[0026] Figure 8 It is a three-dimensional half-section schematic diagram of the support plate driving motor of the present invention.

[0027] Fig. 9 for Figure 8 Enlarged schematic diagram of area C in the middle.

[0028] Fig.10 This is a three-dimensional half-section front view of the support plate driving motor of the present invention.

[0029] Fig.11 for Fig.10 Enlarged schematic diagram of area D in the middle.

[0030] Fig.12 Schematic diagram of the charging socket position of the support plate of the present invention.

[0031] In the figure: 1. Constant temperature cabinet; 2. Support plate clamping edge; 3. Charging contact rod; 4. Support plate outer frame; 5. Support chamber; 6. Charging jack; 7. Battery pack; 8. Split frame plate; 9. Culture slot; 10. Culture dish; 11. Insulation heating ring; 12. Thermal conductive silicone ring; 801. Connecting spring; 802. Motor support plate; 803. Driving motor; 804. Eccentric vibration wheel; 805. Eccentric shaft; 806. Conversion connecting rod; 807. Connecting rod rotating seat; 808. Fixed air cylinder; 809, piston body; 810, one-way exhaust valve; 811, one-way intake valve; 812, suction pipe; 813, pressure control pipe; 814, inner wall convex ring; 815, regulating plug; 816, positioning ring; 817, connecting notch; 818, tension spring; 819, intake end hole; 820, negative pressure connecting nozzle; 821, connecting hose; 822, negative pressure uniform distribution chamber; 823, rubber pad; 824, adsorption bottom hole; 501, LCD display; 502, control knob. DETAILED DESCRIPTION

[0032] 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.

[0033] The present invention provides a technical solution: a constant temperature cabinet for biological culture, such as Figure 1 and Figure 3 As shown in the figure, it includes a constant temperature cabinet 1, a support plate edge 2 and a charging contact rod 3. The interior of the constant temperature cabinet 1 is composed of a heating element and a temperature sensor. The temperature is detected by the temperature sensor, and the temperature is controlled by the heating element. The inner wall surface of the constant temperature cabinet 1 is fixedly provided with a support plate edge 2 and a charging contact rod 3. The position of the charging contact rod 3 corresponds to the position of the support plate edge 2.

[0034] A support plate, which is used in conjunction with a constant temperature cabinet for biological culture, includes a support plate frame 4, a support chamber 5, a charging socket 6 and a battery pack 7, such as Figure 6 As shown in , support chambers 5 are fixedly arranged on both sides of the support plate outer frame 4, and the support chambers 5 are limitedly slidably matched with the support plate clamping edge 2, as shown in FIG. Fig.12 As shown in FIG, a charging socket 6 is provided on the surface of the supporting chamber 5. Figure 6 As shown in the figure, a battery pack 7 is arranged inside the supporting chamber 5, a split frame plate 8 is arranged on the inner side of the support plate outer frame 4, a culture slot 9 is arranged on the split frame plate 8, a culture dish 10 is arranged in the culture slot 9, and a heat preservation heating ring 11 and a heat conductive silicone ring 12 are embedded and installed on the inner wall surface of the culture slot 9. The heat preservation heating ring 11 transfers heat to the culture dish 10 through the heat conductive silicone ring 12, and the battery pack 7 is used to supply power to the heat preservation heating ring 11 so that the heat preservation heating ring 11 generates heat; when the supporting chamber 5 and the support plate clamping edge 2 are in place, the charging contact rod 3 will be inserted into the charging jack 6 to charge the battery pack 7. During the charging process of the battery pack 7, the battery pack 7 stops supplying power to the heat preservation heating ring 11, and a vibration mechanism with an automatic fixing function is provided on the split frame plate 8.

[0035] The vibration mechanism includes a connecting spring piece 801, a motor support plate 802, a driving motor 803 and an eccentric vibration wheel 804. The support plate outer frame 4 and the split frame plate 8 are supported and connected by the connecting spring piece 801. The connecting spring piece 801 is V-shaped. Fig. 9 As shown in , a motor support plate 802 is fixedly provided at the center position of the split frame plate 8, a driving motor 803 is fixedly provided on the motor support plate 802, an eccentric vibration wheel 804 is fixedly provided on the rotating shaft of the driving motor 803, and the driving motor 803 drives the eccentric vibration wheel 804 to rotate, thereby driving the split frame plate 8 to vibrate.

[0036] An eccentric shaft 805 is fixedly provided on the eccentric vibration wheel 804 , a conversion link 806 is swingably connected to the eccentric shaft 805 , and a link rotating seat 807 is swingably connected to the other end of the conversion link 806 .

[0037] A fixed air cylinder 808 is fixedly arranged on the surface of the split frame plate 8 , a piston body 809 is airtightly and slidably arranged in the fixed air cylinder 808 , and a connecting rod swivel seat 807 is fixedly installed with the piston body 809 .

[0038] The ends of the fixed air cylinder 808 are connected and embedded with a one-way exhaust valve 810 and a one-way intake valve 811, and the one-way intake valve 811 is connected and provided with an intake pipe 812. The one-way exhaust valve 810 allows the airflow in the fixed air cylinder 808 to flow toward the outside in one direction, and the one-way intake valve 811 allows the airflow in the intake pipe 812 to flow toward the fixed air cylinder 808 in one direction.

[0039] The end of the intake pipe 812 is connected to a pressure control pipe 813, and an inner wall convex ring 814 is fixedly provided on the inner wall surface of the pressure control pipe 813. A regulating plug 815 is airtightly slidably inserted in the inner wall convex ring 814, and a positioning ring 816 is fixedly provided on the end of the regulating plug 815. A connecting groove 817 is opened inside and outside the surface of the positioning ring 816, and the connecting groove 817 is located on a side of the positioning ring 816 close to the regulating plug 815, and a tension spring 818 is connected and fixed to the surface of the side of the positioning ring 816 away from the regulating plug 815, and the other end of the tension spring 818 is fixedly connected to the inner wall surface of the pressure control pipe 813.

[0040] An air inlet hole 819 is penetrated through the surface of one end of the pressure control tube 813 away from the air intake pipe 812, and a negative pressure connecting nozzle 820 is provided on the outer surface of the pressure control tube 813. The connecting port between the negative pressure connecting nozzle 820 and the pressure control tube 813 is located between the air intake pipe 812 and the inner wall convex ring 814, and a connecting hose 821 is provided on the negative pressure connecting nozzle 820.

[0041] A negative pressure distribution cavity 822 is provided in the support chamber 5, and a rubber pad 823 is fixed to the lower surface of the support chamber 5. An adsorption bottom hole 824 is provided through the rubber pad 823 and the bottom of the negative pressure distribution cavity 822. The negative pressure connecting nozzle 820 is connected with the adsorption bottom hole 824 through the connecting hose 821 and the negative pressure distribution cavity 822 in turn. The rubber pad 823 plays a contact sealing role, and the contact between the rubber pad 823 and the desktop can increase the sealing performance; the connecting hose 821 plays a soft negative pressure connection role. Since the connecting hose 821 is made of soft material, it can reduce the conduction effect of vibration; a metal support ring is provided in the connecting hose 821, so that the connecting hose 821 will not collapse and flatten under negative pressure.

[0042] like Figure 4 As shown in FIG. 5 , a liquid crystal display screen 501 and a control knob 502 are installed on the surface of the supporting chamber 5 . The liquid crystal display screen 501 is used to display the working status of the pallet, and the control knob 502 is used to control the pallet.

[0043] When the thermostatic cabinet and its supporting plate are used, the microorganisms are cultured in the culture dish 10, and the culture dish 10 is placed in the culture slot 9. Figure 6 and Figure 7 as shown in .

[0044] When the pallet is placed in a constant temperature cabinet, Figure 1 In this state, the supporting chamber 5 is set up in the bracket clamp 2, and the charging contact rod 3 is inserted into the charging socket 6 to charge the battery pack 7; when the battery pack 7 is charged, the power supply to the heat preservation heating coil 11 is automatically disconnected, and the heat preservation heating coil 11 stops running. At this time, the temperature is controlled by the constant temperature cabinet 1.

[0045] When it is necessary to remove the tray, first rotate the control knob 502 to preset the heat preservation and heating temperature of the heat preservation and heating coil 11. Then remove the tray, and when the charging contact rod 3 is pulled out from the charging socket 6, the battery pack 7 starts to supply power to the heat preservation and heating coil 11, so that the heat preservation and heating coil 11 generates heat, and the heat preservation and heating coil 11 conducts the heat to the culture dish 10 through the heat conductive silicone ring 12, so that the culture dish 10 reaches the preset heat preservation temperature. In this way, the temperature change of the culture dish 10 can be reduced after the tray is removed.

[0046] When it is necessary to mix the medicines in the culture dish 10, the driving motor 803 drives the eccentric vibration wheel 804 to rotate, thereby driving the split frame plate 8 to vibrate, and the split frame plate 8 drives the culture dish 10 to vibrate, so that the medicines in the culture dish 10 are mixed with each other, thereby reducing or avoiding the use of external objects such as glass stirring rods for stirring, thereby reducing the probability of contamination of the culture dish 10.

[0047] Vibration buffering is performed by connecting the spring sheet 801 to reduce the vibration impact on the support plate outer frame 4. At the same time, during the rotation of the eccentric vibration wheel 804, the eccentric shaft 805, the conversion connecting rod 806 and the connecting rod rotating seat 807 can drive the piston body 809 to move back and forth in the fixed air cylinder 808. Fig. 9 As shown in the figure, when the piston body 809 moves to the right, the gas in the fixed gas cylinder 808 will be squeezed and discharged to the outside through the one-way exhaust valve 810; when the piston body 809 moves to the left, the negative pressure inside the fixed gas cylinder 808 drives the air flow in the suction pipe 812 to flow into the fixed gas cylinder 808; during the reciprocating movement of the piston body 809, the suction pipe 812 continuously draws air.

[0048] The negative pressure suction force generated by the suction pipe 812 passes through the pressure control pipe 813, the negative pressure connecting nozzle 820, the connecting hose 821 and the negative pressure distribution chamber 822 in sequence, so that the adsorption bottom hole 824 is sucked in. The adsorption bottom hole 824 is adsorbed and fixed to the desktop under negative pressure, so that the supporting chamber 5 and the pallet outer frame 4 are adsorbed and fixed to the desktop, thereby preventing the entire pallet from being moved due to vibration during the vibration of the split frame plate 8.

[0049] Since the suction pipe 812 continuously evacuates air, when the adsorption bottom hole 824 is adsorbed and fixed to the desktop under negative pressure, the negative pressure will attract the regulating plug 815 to move to the side where the suction pipe 812 is located, causing the connecting slot 817 to move out of the inner wall convex ring 814. At this time, the external gas will enter the pressure control pipe 813 through the air inlet end hole 819 and the connecting slot 817 in turn, keeping the negative pressure in the pressure control pipe 813 from continuing to increase, avoiding affecting the activity of the piston body 809 and causing the eccentric vibration wheel 804 to be unable to rotate.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A constant temperature cabinet for biological culture, comprising a supporting plate, a constant temperature cabinet body (1), a supporting plate clamping edge (2) and a charging contact rod (3) for use together, characterized in that: A support plate clamping edge (2) and a charging contact rod (3) are fixedly arranged on the inner wall surface of the thermostatic cabinet (1), and the charging contact rod (3) corresponds to the position of the support plate clamping edge (2); The support plate comprises a support plate outer frame (4), a support chamber (5), a charging socket (6) and a battery pack (7). The support chambers (5) are fixedly arranged on both sides of the support plate outer frame (4), the support chambers (5) are limitedly slidably matched with the support plate clamping edge (2), the surface of the support chamber (5) is provided with a charging socket (6), the interior of the support chamber (5) is provided with a battery pack (7), the inner side of the support plate outer frame (4) is provided with a split frame plate (8), a culture slot (9) is arranged on the split frame plate (8), a culture dish (10) is arranged in the culture slot (9), and a heat preservation heating ring (11) and a heat conductive silicone ring (12) are embedded and installed on the inner wall surface of the culture slot (9). The heat preservation heating ring (11) conducts heat to the culture dish (10) through the heat-conducting silicone ring (12); the battery pack (7) is used to supply power to the heat preservation heating ring (11), so that the heat preservation heating ring (11) generates heat; when the support chamber (5) and the support plate clamping edge (2) are in place, the charging contact rod (3) is inserted into the charging socket (6) to charge the battery pack (7); during the charging process of the battery pack (7), the battery pack (7) stops supplying power to the heat preservation heating ring (11); a vibration mechanism with an automatic fixing function is provided on the split frame plate (8); the vibration mechanism comprises a connecting spring (801), a motor support plate (802), a drive motor (803) and an eccentric vibration wheel (804) ), the support plate outer frame (4) and the split frame plate (8) are supported and connected via a connecting spring sheet (801); a motor support plate (802) is fixedly provided at the center of the split frame plate (8); a driving motor (803) is fixedly provided on the motor support plate (802); an eccentric vibration wheel (804) is fixedly provided on the rotating shaft of the driving motor (803); the driving motor (803) drives the eccentric vibration wheel (804) to rotate, thereby driving the split frame plate (8) to vibrate; an eccentric shaft (805) is fixedly provided on the eccentric vibration wheel (804); a conversion connecting rod (806) is swingably connected to the eccentric shaft (805); the other end of the conversion connecting rod (806) is swingably connected to the A connecting rod swivel seat (807) is provided; a fixed air cylinder (808) is fixedly provided on the surface of the split frame plate (8); a piston body (809) is airtightly slidably provided in the fixed air cylinder (808); the connecting rod swivel seat (807) and the piston body (809) are fixedly installed; a one-way exhaust valve (810) and a one-way intake valve (811) are connected and embedded in the end of the fixed air cylinder (808); an air intake pipe (812) is connected and provided on the one-way intake valve (811); the one-way exhaust valve (810) allows the airflow in the fixed air cylinder (808) to flow unidirectionally toward the outside; and the one-way intake valve (811) allows the airflow in the intake pipe (812) to flow unidirectionally toward the fixed air cylinder (808);The end of the air intake pipe (812) is connected to a pressure control pipe (813), an inner wall convex ring (814) is fixedly provided on the inner wall surface of the pressure control pipe (813), a regulating plug (815) is airtightly slidably inserted in the inner wall convex ring (814), a positioning ring (816) is fixedly provided on the end of the regulating plug (815), a connecting slot (817) is provided through the surface of the positioning ring (816) inside and outside, the connecting slot (817) is located on a side of the positioning ring (816) close to the regulating plug (815), a tension spring (818) is connected and fixedly provided on the side of the positioning ring (816) away from the regulating plug (815), and the other end of the tension spring (818) is fixedly connected to the inner wall surface of the pressure control pipe (813); the pressure control pipe (813) is away from the air intake pipe. An air inlet hole (819) is formed through one end surface of the (812); a negative pressure connection nozzle (820) is provided on the outer surface of the pressure control tube (813); the connection port between the negative pressure connection nozzle (820) and the pressure control tube (813) is located between the air intake tube (812) and the inner wall convex ring (814); a connection hose (821) is provided on the negative pressure connection nozzle (820); a negative pressure distribution cavity (822) is formed in the support chamber (5); a rubber pad (823) is attached and fixed to the lower surface of the support chamber (5); an adsorption bottom hole (824) is formed through the bottom of the rubber pad (823) and the negative pressure distribution cavity (822); the negative pressure connection nozzle (820) is connected to the adsorption bottom hole (824) through the connection hose (821) and the negative pressure distribution cavity (822) in sequence. ; 2. A constant temperature cabinet for biological culture according to claim 1, characterized in that: A liquid crystal display screen (501) and a control knob (502) are installed on the surface of the supporting chamber (5); the liquid crystal display screen (501) is used to display the working status of the support plate, and the control knob (502) is used to control the support plate.

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