A speed control switch assembly for food preparation equipment and the food preparation equipment itself.

Abstract

This application provides a speed control switch assembly for a food preparation device and the food preparation device itself. The circuit board assembly of the speed control switch assembly has inching mode contacts, normal mode contacts, and acceleration mode contacts. A first speed control knob is rotatable relative to the circuit board assembly. A first spring contact, driven by the first speed control knob, electrically contacts the inching mode contacts and the normal mode contacts to conduct the circuits corresponding to different speed levels. One end of the switch spring contact is electrically connected to the circuit board assembly and the first spring contact respectively. When the second speed control knob is pressed, it abuts against the switch spring contact to drive the other end of the switch spring contact to electrically connect to the acceleration mode contact on the circuit board assembly, conducting the circuit corresponding to the acceleration mode. A single speed control switch assembly can achieve adjustment of inching mode, normal mode, and acceleration mode, enabling acceleration during inching mode and acceleration during normal mode. The structure is simple, and it ensures that each mode can independently or collaboratively control the speed precisely.

Description

Technical Field

[0001] This application relates to the field of food preparation technology, and in particular to a speed control switch assembly and food preparation equipment. Background Technology

[0002] Currently, the speed control switch components of food preparation equipment sold on the market have relatively complex structures, or the speed settings cannot be precisely controlled, making it impossible to achieve integrated control of multiple speed modes (e.g., jog mode, normal mode, and acceleration mode). For example, Chinese utility model patent CN220212758U discloses an integrated switch mechanism and a food mixing device using it, including a switch element that can rotate from an OFF position to a jog position in a first direction to activate the motor, and a switch element that can rotate from an OFF position to a speed control position in a second direction to activate the motor, the first direction being opposite to the second direction; and an elastic reset element configured to elastically drive the switch element to reset from the jog position to the OFF position, thereby stopping the motor. Utility Model Content

[0003] The purpose of this application is to provide a speed control switch assembly for a food preparation device and the food preparation device itself.

[0004] The embodiments of this application adopt the following technical solution: a speed control switch assembly for a food preparation device, comprising:

[0005] The circuit board assembly has multiple different gear contacts, including inching gear contacts, normal gear contacts, and acceleration gear contacts;

[0006] A first speed control knob is rotatable relative to the circuit board assembly;

[0007] The first spring is connected to the first speed control knob and, driven by the first speed control knob, makes electrical contact with the inching gear contact and the normal gear contact to conduct the circuit corresponding to different speed gears.

[0008] A switch spring, one end of which is electrically connected to the circuit board assembly and the first spring, respectively;

[0009] The second speed control knob, when pressed, abuts against the switch spring to drive the other end of the switch spring to electrically connect with the acceleration mode contact on the circuit board assembly, thereby activating the circuit corresponding to the acceleration mode.

[0010] This application embodiment uses a speed control switch assembly to realize the adjustment of inching gear, normal gear and acceleration gear. It can realize acceleration in inching gear and acceleration in normal gear. The structure is simple and can ensure that the speed can be controlled independently or in a coordinated manner.

[0011] In some embodiments, the gear position contact includes a plurality of conventional gear position contacts, each of which corresponds to a different cooking speed of the food processing device;

[0012] The multiple conventional gear contacts and the inching gear contacts are arranged in an arc shape on one of the surfaces of the circuit board assembly. The rotation of the first spring contact can engage with the multiple conventional gear contacts and the inching gear contacts arranged in an arc shape, facilitating gear adjustment in different speed modes.

[0013] In some embodiments, when the first speed control knob rotates relative to the circuit board assembly in a first direction, it causes the first spring to switch from the OFF position to an electrical connection with the conventional position contact.

[0014] When the first speed control knob rotates relative to the circuit board assembly in the second direction, it causes the first spring to switch from the OFF position to an electrical connection with the inching mode contact; wherein, the first direction is opposite to the second direction. The rotation of the first speed control knob in different directions realizes the switching between inching mode and normal mode, making it convenient for the user to confirm the current mode to be adjusted.

[0015] In some embodiments, the first spring includes a contact spring and a speed regulating spring, and each of the conventional gear contacts includes a speed regulating contact and an electrically conductive contact;

[0016] When the contact spring switches electrical contact between multiple speed-regulating contacts, it maintains electrical contact with the electrically conductive contact. The contact spring and the speed-regulating spring operate synchronously, and the contact spring maintains electrical contact with the electrically conductive contact, ensuring that the circuit at the corresponding speed can be connected when the speed-regulating spring switches between the conventional speed contacts at different gear levels.

[0017] In some embodiments, each of the conventional gear contacts corresponds to a different resistor. When different conventional gear contacts are electrically connected to the first spring contact, different resistors are connected to the circuit so that the food processing device can be controlled to process food at different speeds when different circuits are connected.

[0018] In some embodiments, the speed control switch assembly further includes an angle knob, wherein the first speed control knob is connected to the angle knob and drives the angle knob to rotate;

[0019] One end of the first spring is connected to the angle knob. The first spring rotates under the action of the angle knob, so that the other end of the first spring makes electrical contact with the inching gear contact and the normal gear contact. The angle knob serves as the mounting base for the first spring, transmitting the rotational action of the first speed control knob to the first spring, so that the first spring can be adjusted and controlled by the first speed control knob.

[0020] In some embodiments, the switch spring has a protrusion that faces the second speed control knob. When the second speed control knob is pressed, the protrusion is pressed towards the circuit board assembly, so that the other end of the switch spring makes electrical contact with the acceleration mode contact. The protrusion of the switch spring facilitates the control of the switch spring by the second speed control knob.

[0021] In some embodiments, the speed control switch assembly further includes a return spring that abuts against the second speed control knob. When the second speed control knob is pressed, the return spring is compressed; when the second speed control knob is released, the return spring extends to relieve the squeezing effect of the second speed control knob on the protrusion. The return spring facilitates the reset adjustment of the second speed control knob.

[0022] In some embodiments, the speed control switch assembly further includes a torsion spring disposed on the first speed control knob; when the first speed control knob is rotated to the point where the first spring contacts the jog position contact, the torsion spring is compressed and twisted; when the first speed control knob is released, the torsion spring extends to drive the first speed control knob back to the OFF position. The torsion spring enables rapid switching of the first speed control knob between the OFF position and the jog position.

[0023] This application also provides a food preparation device, including a speed control switch assembly as described in any of the above embodiments. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the external structure of the food preparation equipment in this application;

[0026] Figure 2 This is a cross-sectional structural diagram of the speed control switch assembly of this application (including some other structures of the food preparation equipment);

[0027] Figure 3This is an exploded view of the speed control switch assembly of this application;

[0028] Figure 4 This is a schematic diagram of the structure of the first speed control knob of this application when it is rotated in the first direction;

[0029] Figure 5 This is a schematic diagram of the circuit board assembly of this application;

[0030] Figure 6 This is a schematic diagram of the structure of the first speed control knob of this application when it is rotated in the first direction;

[0031] Figure 7 This is a schematic diagram of the assembly structure of the first speed control knob and the torsion spring in this application;

[0032] Figure 8 This is a schematic diagram of the switchboard bracket of this application;

[0033] Figure 9 This is a schematic diagram of the switch spring and changeover knob of this application;

[0034] Figure 10 This is a schematic diagram of the structure when the first spring is electrically connected to the inching gear contact in this application;

[0035] Figure 11 This is a schematic diagram of the structure when the first spring of this application is electrically connected to the conventional gear position contact;

[0036] Figure 12 This is a schematic diagram showing the structure when the second speed control button of this application is pressed, and the switch spring is electrically connected to the acceleration gear contact.

[0037] Reference numerals: 1. Screw; 2. Circuit board assembly; 21. Speed ​​control contact; 22. Electrically conductive contact; 23. Jog position contact; 24. Acceleration position contact; 3. Switch spring; 4. Connecting spring; 5. Contact spring; 6. Speed ​​control spring; 7. Push rod spring; 8. Slide rod; 9. Angle knob; 91. Second gear tooth; 10. Switch board bracket; 11. Torsion spring; 12. Second speed control knob; 13. First speed control knob; 131. First gear tooth; 14. Changeover knob; 15. Return spring; 16. Handle housing; 17. Stirring rod. Detailed Implementation

[0038] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0039] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this application will be apparent to those skilled in the art.

[0040] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0041] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0042] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application.

[0043] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0044] Specific embodiments of this application are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in a variety of substantially any suitable detailed structures.

[0045] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0046] To address the problems in the background art, this application provides a speed control switch assembly for a food preparation device, combined with... Figure 1 and Figure 2 The food preparation equipment can be an egg beater, a mixer, a dough mixer, or other food preparation equipment; no specific restrictions are imposed here.

[0047] Here, we will use an egg beater as an example to illustrate the process. The egg beater includes a whisk 17 for beating eggs. The whisk 17 is connected to the motor of the food processing equipment. The motor is electrically connected to the circuit board assembly 2 of the speed control switch assembly. The circuit board assembly 2 may include a control circuit for the electrodes. This control circuit may include multiple different circuit conduction modes. Under different circuit conduction modes, the circuit board assembly 2 can control the rotation speed and rotation mode of the motor, thereby controlling the rotation mode of the whisk 17. The circuit board assembly 2 can be a PCB board assembly.

[0048] Combination Figure 2 and Figure 3 The speed control switch assembly includes a circuit board assembly 2, a first speed control knob 13, a first spring, a switch spring 3, and a second speed control knob 1312. This speed control switch assembly can be mounted on the handle housing 16 of the food processor.

[0049] Among them, combined Figure 5 The circuit board assembly 2 has multiple different speed control contacts, including a momentary speed control contact 23, a normal speed control contact, and an acceleration speed control contact 24. These contacts can be located on one of the surfaces of the circuit board assembly 2. When the momentary speed control contact 23 is activated, the momentary speed mode is engaged. In this mode, the circuit board assembly 2 can control the motor to drive the stirring rod 17 to rotate briefly and then stop. This mode can prevent the motor from overheating due to excessive working pressure caused by too much food or prolonged operation of the food processing equipment. The momentary speed mode can also be activated when the food has been processed to near the user's needs, preventing over-processing of the food.

[0050] The circuit board assembly 2 can be housed within the handle housing 16. The first speed control knob 13 can be arranged parallel to the circuit board assembly 2 and can rotate relative to the circuit board assembly 2. The first speed control knob 13 can be rotatably mounted on the switch board bracket 10 and can be limited on the switch board bracket 10 by screws 1. The first speed control knob 13 can also be housed within the handle housing 16, and one end of the first speed control knob 13 can extend out of the handle housing 16. The handle housing 16 can be provided with a rotating hole to provide space for the rotation of the first speed control knob 13, and this rotating hole can be an elongated hole. The first speed control knob 13 can be located on the side of the circuit board assembly 2 where the gear contacts are located.

[0051] The first spring can be disposed inside the handle housing 16. The first spring can be connected to the first speed control knob 13 and, under the action of the first speed control knob 13, electrically contact the inching gear contact 23 and the normal gear contact to conduct the circuit corresponding to different speed gears. For example, combined with Figure 4 , Figure 5 , Figure 6 , Figure 10 and Figure 11The first speed control knob 13 can drive the first spring to rotate in a first direction, which can be counterclockwise. Under the driving action of the first speed control knob 13 rotating in the first direction, the first spring can switch from the OFF position (the OFF position can be used as the initial position of the first spring) to electrical contact with the normal setting contact. At this time, the circuit corresponding to the normal setting can be turned on, and the food processing device can process the food at the speed corresponding to the current normal setting. The normal setting can include multiple settings, for example, five settings: setting 1, setting 2, setting 3, setting 4, and setting 5. The higher the setting, the higher (or lower) the processing speed of the food processing device can be. Each setting corresponds to a normal setting contact on the circuit board assembly 2. For example, when the first spring is electrically in contact with the setting 1 contact on the circuit board assembly 2, the food processing device is in normal setting setting 1.

[0052] Each of the aforementioned standard setting contacts corresponds to a different resistor. When different standard setting contacts are electrically connected to the first spring contact, different resistors are connected to the circuit, so that the food processing equipment can be controlled to process food at different speeds under different circuit conduction conditions. The different resistances corresponding to each standard setting contact are controlled by a silicon controlled rectifier (SCR) to achieve different rotation speeds.

[0053] Of course, it is understood that the standard gear position may also include other numbers of gear positions; this is merely an example and does not constitute a limitation on the scope of protection of the claims.

[0054] When the first speed control knob 13 is rotated in the second direction, the first spring can change from the OFF position to contact the inching mode contact 23 on the circuit board assembly 2. At this time, the food processing device can process the food at the speed corresponding to the inching mode. The processing speed corresponding to the inching mode can be lower than the speed corresponding to the lowest speed in the normal mode (minimum speed), and the speed of the inching mode can also be set as needed.

[0055] The OFF position can be located between the normal position and the jog position. When the first spring is in the OFF position, the food processing device can be in a mode where it does not process the food.

[0056] A switch spring 3 is also disposed inside the handle housing 16, with one end of the switch spring 3 electrically contacting the circuit board assembly 2 and the first spring, respectively. The circuit board assembly 2, the switch spring 3, and the first spring can be fixed to the switch board bracket 10 by screws 1. For example, a connection hole can be formed on the circuit board of the circuit board assembly 2, and the screw 1 can pass through the connection hole on the circuit board, the through hole at one end of the switch spring 3, and the through hole on the first spring, and then connect to the threaded hole on the switch board bracket 10. One end of the switch spring 3 is electrically connected to the circuit board assembly 2, and a conductive connecting spring 4 can be provided between the first spring and the switch spring 3. The first spring can contact the switch spring 3 through the connecting spring 4, and the connecting spring 4 can be sleeved on the screw 1, with both ends of the connecting spring 4 abutting against the switch spring 3 and the first spring, respectively.

[0057] The second speed control knob 12 can also be located inside the handle housing 16, and one end of the second speed control knob 12 can extend outside the handle housing 16. The position of the second speed control knob 12 can be adjusted by adjusting the portion extending outside the handle housing 16, thereby adjusting the position of the switch spring 3. Combined with... Figure 12 For example, when the second speed control knob 12 is pressed, it can abut against the switch spring 3, thereby driving the other end of the switch spring 3 to electrically connect with the acceleration mode contact 24 on the circuit board assembly 2, thus activating the circuit corresponding to the acceleration mode. When the circuit corresponding to the acceleration mode is activated, the food processing equipment is in the acceleration mode, enabling the food processing equipment to process the food at high speed.

[0058] For example, in the acceleration mode, the food processing device can process the food at the highest speed (greater than the maximum speed corresponding to the normal mode and the speed of the jog mode). It should be noted that regardless of whether the first spring is electrically connected to the jog mode contact 23 or the normal mode contact, as long as the other end of the switch spring 3 is electrically in contact with the acceleration mode contact 24, the circuit corresponding to the acceleration mode will be connected, and the food processing device will process the food at the highest speed.

[0059] This embodiment of the application uses a speed control switch assembly to achieve adjustment of inching, normal, and acceleration gears, enabling acceleration during inching and normal modes. Furthermore, integrating the first speed control knob 13 and the second speed control knob 12 reduces space occupation, simplifies the structure, and ensures that each gear can independently or collaboratively control speed precisely.

[0060] The gear selector contacts include multiple conventional gear selector contacts, each corresponding to a different cooking speed of the food processing device. In the above embodiment, when the conventional gear selector includes five gears, the circuit board assembly 2 can be equipped with five conventional gear selector contacts: gear 1, gear 2, gear 3, gear 4, and gear 5. Each of the five conventional gear selector contacts corresponds to a different cooking speed at one of the five gears.

[0061] The multiple conventional gear contacts and the inching gear contacts 23 are arranged in an arc shape on one of the boards of the circuit board assembly 2. In this way, the rotation of the first spring can make contact with the multiple conventional gear contacts and the inching gear contacts 23 arranged in an arc shape, which facilitates the adjustment of the gear in different speed modes.

[0062] In some embodiments, when the first speed control knob 13 rotates relative to the circuit board assembly 2 in a first direction, it causes the first spring to switch from the OFF position to electrical connection with the normal position contact. When the first speed control knob 13 rotates relative to the circuit board assembly 2 in a second direction, it causes the first spring to switch from the OFF position to electrical connection with the inching position contact 23. The first direction is opposite to the second direction. Rotation of the first speed control knob 13 in different directions switches between inching and normal positions, allowing the user to confirm the currently selected gear mode.

[0063] For example, one end of the first spring can be connected to the first speed control knob 13. When the first speed control knob 13 rotates, it can drive the first spring to rotate. The other end of the first spring can be switched from the OFF position to the position where the normal position contact is located, and the other end of the first spring can achieve electrical connection with the normal position contact.

[0064] The first spring can be directly connected to the first speed control knob 13, and the first spring can rotate in the same direction as the first speed control knob 13 when the first speed control knob 13 is rotated. The first spring can also rotate with the first speed control knob 13 via a connector. For example, in some embodiments, the speed control switch assembly further includes an angle knob 9, which can be used as a connector between the first spring and the first speed control knob 13. The first speed control knob 13 is connected to the angle knob 9 and drives the angle knob 9 to rotate. One end of the first spring is connected to the angle knob 9, and the first spring rotates under the drive of the angle knob 9, so that the other end of the first spring makes electrical contact with the inching gear contact 23 and the normal gear contact. The angle knob 9 serves as the mounting base for the first spring, transmitting the rotational action of the first speed control knob 13 to the first spring, so that the first spring can be adjusted and controlled by the first speed control knob 13.

[0065] The first speed control knob 13, located inside the handle housing 16, can be provided with a first gear 131 at one end, and a second gear 91 on the angle knob 9. The first gear 131 of the first speed control knob 13 can mesh externally with the second gear 91 of the angle knob 9. When the first speed control knob 13 rotates in the first direction, the rotational force can be transmitted to the second gear 91 of the angle knob 9 through the first gear 131, so that the angle knob 9 can rotate in the second direction, thereby driving the first spring connected to the angle knob 9 to rotate in the second direction as well, realizing the first spring from the OFF position to the position where the normal position contact is located, and electrically connecting with the normal position contact. When the first speed control knob 13 rotates in the second direction, it can drive the angle knob 9 and the first spring to rotate in the first direction, so that the other end of the first spring can be switched from the OFF position to the position where the inching position contact 23 is located, and electrically contact the inching position contact 23.

[0066] A slide rod 8 and a push rod spring 7 can also be installed inside the handle housing 16. The push rod spring 7 can push one end of the slide rod 8 against the position of the first gear tooth 131. When the first speed control knob 13 is turned, the slide rod 8 can contact different first gear teeth 131, making a clicking sound, giving the user a tactile feel.

[0067] In some embodiments, the first spring includes a contact spring 5 and a speed regulating spring 6, and each conventional gear contact includes a speed regulating contact 21 and an electrically conductive contact 22. The contact spring 5 and the speed regulating spring 6 can be fixed together to form an integral first spring; of course, the contact spring 5 and the speed regulating spring 6 can also be set independently.

[0068] The angle knob 9 has a rotating shaft, and one end of the contact spring 5 and one end of the speed regulating spring 6 can be connected to the rotating shaft of the angle knob 9 respectively. One end of the contact spring 5 and one end of the speed regulating spring 6 can be provided with a pawl, and a slot can be provided on the angle knob 9. The pawl can be locked in the slot to realize the connection between the contact spring 5 and the speed regulating spring 6 and the angle knob 9.

[0069] The lengths of the contact spring 5 and the speed regulating spring 6 can be different; for example, the length of the speed regulating spring 6 can be greater than the length of the contact spring 5. The other end of both the contact spring 5 and the other end of the speed regulating spring 6, facing the circuit board assembly 2, can be provided with contacts for electrical connection, so that the other end of the contact spring 5 can make electrical contact with the electrically conductive contact 22, and the other end of the speed regulating spring 6 can make electrical contact with the speed regulating contact 21.

[0070] When the contact spring 5 switches electrical contact between the multiple speed-regulating contacts 21, the contact spring 5 maintains electrical contact with the electrically conductive contact 22. For example, the electrically conductive contact 22 can be an elongated contact arranged in an arc shape, while each speed-regulating contact 21 is independently configured, i.e., one speed-regulating contact 21 corresponds to one normal speed setting. In this way, the contact spring 5 and the speed-regulating spring 6 can operate synchronously, and when the speed-regulating spring 6 switches between different normal speed settings, the contact spring 5 can maintain electrical contact with the electrically conductive contact 22, ensuring that the circuit at the corresponding speed can be promptly connected when the speed-regulating spring 6 switches between the normal speed settings.

[0071] Of course, it is understandable that the electrically conductive contact 22 can also be set in a one-to-one correspondence with the speed control contact 21, that is, each normal gear contact corresponds to one electrically conductive contact 22. When the other end of the speed control spring 6 contacts one of the speed control contacts 21, the other end of the contact spring 5 will also make electrical contact with one of the speed control contacts 21.

[0072] In some embodiments, the switch spring 3 has a protrusion protruding towards the second speed control knob 12. When the second speed control knob 12 is pressed, the protrusion is pressed towards the circuit board assembly 2, so that the other end of the switch spring 3 makes electrical contact with the acceleration mode contact 24. The protrusion of the switch spring 3 facilitates the control of the switch spring 3 by the second speed control knob 12.

[0073] For example, when the second speed control button 12 is not pressed, the other end of the switch spring 3 is not in contact with the acceleration mode contact 24 on the circuit board assembly 2, and there is a certain gap between the other end of the switch spring 3 and the circuit board assembly 2. A protrusion can be provided in the middle of the switch spring 3, which protrudes towards the second speed control button 12. When the second speed control button 12 is pressed, the second speed control button 12 can squeeze the protrusion. Since the switch spring 3 has a certain elasticity, when the protrusion is squeezed by the second speed control button 12, the other end of the switch spring 3 moves towards the acceleration mode contact 24 on the circuit board assembly 2. The other end of the switch spring 3 is provided with a contact that can be electrically connected to the acceleration mode contact 24. The contact at the other end of the switch spring 3 can make electrical contact with the acceleration mode contact 24, so that the circuit corresponding to the acceleration mode of the food processing device is turned on, thereby enabling the food processing device to process the food at the acceleration mode. When the second speed control knob 12 is released, the second speed control knob 12 can be reset, the second speed control knob 12 releases the squeezing action on the switch spring, and the other end of the switch spring disconnects the electrical connection with the acceleration gear contact 24.

[0074] In some embodiments, the speed control switch assembly further includes a reset spring 15, which abuts against the second speed control knob 12. For example, one end of the reset spring 15 may abut against the end of the second speed control knob 12 located inside the handle housing 16, and the other end of the reset spring 15 may abut against the inner wall of the handle housing 16, or the other end of the reset spring 15 may abut against the switch plate bracket 10.

[0075] The second speed control knob 12 may have an extension that extends toward the protrusion of the switch spring 3, and the return spring 15 may abut against the end of the second speed control knob 12 located inside the handle housing 16. When the second speed control knob 12 is pressed, the extension may squeeze the protrusion of the switch spring 3, causing the other end of the switch spring 3 to make electrical contact with the acceleration gear contact 24.

[0076] Alternatively, the second speed control knob 12 may have an extension that protrudes in the same direction as the protrusion of the switch spring 3. Once the return spring 15 can abut against the extension, when the second speed control knob 12 is pressed, the end of the second speed control knob 12 located inside the handle housing 16 abuts against the protrusion of the switch spring 3 to squeeze the protrusion, so that the other end of the switch spring 3 makes electrical contact with the acceleration gear contact 24.

[0077] When the second speed control knob 12 is pressed, the return spring 15 is compressed. When the second speed control knob 12 is released, the return spring 15 extends and pushes the second speed control knob 12 back to its original position, thereby relieving the squeezing effect of the second speed control knob 12 on the protruding part of the switch spring 3. The return spring 15 facilitates the reset adjustment of the second speed control knob 12.

[0078] In another embodiment, the return spring 15 can also be connected to the second speed control knob 12 via the selector knob 14. For example, one end of the selector knob 14 is connected to the end of the second speed control knob 12 located inside the handle housing 16, and one end of the return spring 15 can be connected to the other end of the selector knob 14. For example, the end of the selector knob 14 connected to the return spring 15 can be provided with a receiving hole, and one end of the return spring 15 can be disposed in the receiving hole. When the return spring 15 is extended and reset from the compressed state, one end of the return spring 15 will not disengage from the receiving hole. The selector knob 14 has an extension extending towards the switch spring 3. When the second speed control knob 12 is pressed, it drives the selector knob 14 to move, and the extension on the selector knob 14 ( Figure 9 Part B) can press the protrusion of switch spring 3 ( Figure 9 In section C), the return spring 15 is compressed, and the other end of the switch spring 3 can be electrically connected to the acceleration gear contact 24. When the second speed control knob 12 is released, the return spring 15 extends and resets, driving the changeover knob 14 and the second speed control knob 12 to reset.

[0079] A first guide block for the action of the second speed control knob 12 and a second guide block for the action of the conversion knob 14 can be set on the switch plate bracket 10 so that the second speed control knob 12 and the conversion knob 14 can move smoothly and achieve stable adjustment of different speed levels of the food processing equipment.

[0080] In some embodiments, combined with Figure 7 The speed control switch assembly may further include a torsion spring 11, which is disposed on the first speed control knob 13. When the first speed control knob 13 is rotated until the other end of the first spring contacts the jog position contact 23, the torsion spring 11 is compressed and twisted; when the first speed control knob 13 is released, the torsion spring 11 extends to drive the first speed control knob 13 back to the OFF position. The torsion spring 11 can realize the rapid switching of the first speed control knob 13 between the OFF position and the jog position.

[0081] For example, the torsion spring 11 may have an extension portion, and an extension plate may be provided on the switch plate bracket 10. During the process of the first speed control knob 13 rotating and driving the first spring to move towards the jog position contact 23, the torsion spring 11 twists with the rotation of the first speed control knob 13, and the extension portion of the torsion spring 11 can rotate onto one plate surface of the extension plate of the switch plate bracket 10. Figure 8 When the other end of the first spring piece moves to the position of the jog mode contact 23 (on the A-side of the switch plate), the extension plate will maintain its limiting effect on the extension of the torsion spring 11, and the torsion spring 11 will be continuously twisted and compressed. When the first speed control button 13 is released, the extension of the torsion spring 11 disengages from the extension plate of the switch plate bracket 10, and the torsion spring 11 extends and resets, causing the first speed control button 13 to reset, thereby causing the other end of the first spring piece to release its electrical contact with the jog mode contact 23.

[0082] The contacts on the aforementioned circuit board assembly 2 may be made of copper foil, but are not limited to.

[0083] This application also provides a food preparation device, including a speed control switch assembly as described in any of the above embodiments. The food preparation device may also include a handle, a motor, a stirring rod 17, and other structures. The speed control switch assembly is disposed on the handle housing 16 of the handle. One end of the first speed control knob 13 and one end of the second speed control knob 12 of the speed control switch assembly can extend outside the handle housing 16. The user can adjust the speed of the speed control switch assembly by moving the first speed control knob 13 and pressing the second speed control knob 12.

[0084] This food processing equipment can process food under normal, intermittent, and accelerated conditions.

[0085] The foregoing has described in detail several embodiments of this application, but this application is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications based on the concept of this application, and all such variations and modifications should fall within the scope of protection claimed in this application.

Claims

1. A speed regulating switch assembly for a food material processing device, comprising: include: The circuit board assembly (2) has multiple different gear contacts, including a jog gear contact (23), a normal gear contact and an acceleration gear contact (24); The first speed control knob (13) is rotatable relative to the circuit board assembly (2); The first spring is connected to the first speed control knob (13) and, driven by the first speed control knob (13), makes electrical contact with the inching gear contact (23) and the regular gear contact to conduct the circuit corresponding to different speed gears. The switch spring (3) has one end electrically in contact with the circuit board assembly (2) and the first spring, respectively; The second speed control knob (12) abuts against the switch spring (3) when pressed, so as to drive the other end of the switch spring (3) to be electrically connected to the acceleration gear contact (24) on the circuit board assembly (2) and conduct the circuit corresponding to the acceleration gear.

2. The speed regulating switch assembly of claim 1, wherein, The gear position contact includes multiple conventional gear position contacts, each of which corresponds to a different cooking speed of the food processing equipment; The plurality of conventional gear contacts and the jog gear contacts (23) are arranged in an arc shape on one of the board surfaces of the circuit board assembly (2).

3. The speed regulating switch assembly of claim 2, wherein, When the first speed control knob (13) rotates relative to the circuit board assembly (2) in the first direction, it drives the first spring to switch from the OFF position to an electrical connection with the conventional position contact. When the first speed control knob (13) rotates relative to the circuit board assembly (2) in the second direction, it drives the first spring to switch from the OFF position to be electrically connected to the inching position contact (23); wherein, the first direction is opposite to the second direction.

4. The speed regulating switch assembly of claim 1, wherein, The first spring includes a contact spring (5) and a speed regulating spring (6), and each of the conventional gear contacts includes a speed regulating contact (21) and an electrically conductive contact (22); When the contact spring (5) switches electrical contact between the multiple speed-regulating contacts (21), the contact spring (5) maintains electrical contact with the electrically conductive contact (22).

5. The speed regulating switch assembly of claim 1, wherein, Each of the conventional gear contacts corresponds to a different resistor. When different conventional gear contacts are electrically connected to the first spring contact, different resistors are connected to the circuit.

6. The speed regulating switch assembly of claim 1, wherein, The speed control switch assembly also includes an angle knob (9), the first speed control knob (13) is connected to the angle knob (9) and drives the angle knob (9) to rotate; One end of the first spring is connected to the angle knob (9). The first spring rotates under the drive of the angle knob (9) so that the other end of the first spring makes electrical contact with the inching gear contact (23) and the normal gear contact.

7. The speed regulating switch assembly of claim 1, wherein, The switch spring (3) has a protrusion that protrudes toward the second speed control knob (12). When the second speed control knob (12) is pressed, the protrusion is pressed toward the circuit board assembly (2) so that the other end of the switch spring (3) makes electrical contact with the acceleration gear contact (24).

8. The speed regulating switch assembly of claim 7, wherein, The speed control switch assembly also includes a reset spring (15), which abuts against the second speed control button (12). When the second speed control button (12) is pressed, the reset spring (15) is compressed. When the second speed control button (12) is released, the reset spring (15) extends to release the squeezing effect of the second speed control button (12) on the protrusion.

9. The speed regulating switch assembly of claim 1, wherein, The speed control switch assembly also includes a torsion spring (11), which is disposed on the first speed control knob (13). When the first speed control knob (13) is rotated to the point where the first spring contacts the inching position contact (23), the torsion spring (11) is squeezed and twisted. When the first speed control knob (13) is released, the torsion spring (11) extends to drive the first speed control knob (13) to reset to the OFF position.

10. A food material conditioning apparatus characterized by comprising: Includes the speed control switch assembly as described in any one of claims 1 to 9.

Images