Arm lifting labor-saving structure and baking device

Abstract

The application discloses a lifting arm labor-saving structure and a frying and baking device, and belongs to a food cooking appliance. The existing frying and baking device has the defect that it is labor-consuming to lift the arm to adjust the position of the upper baking tray. The arm is rotatably arranged on the fixed support member to rotate to the first position, the second position or the third position. The second position is located between the first position and the third position. The arm is in the flat state when being located at the first position and the third position. The arm is in the upright state when being located at the second position. A spring is arranged at the assembly position of the arm and the support member. The spring acts on the arm and the support member. When the arm rotates between the first position and the second position and rotates between the second position and the third position, the spring exerts the elastic force on the arm in the direction of the second position to offset a part of the gravity, so that the labor is saved when the arm is lifted.

Description

Technical Field

[0001] This invention pertains to food cooking appliances, specifically relating to a lifting arm-saving structure and a grill. Background Technology

[0002] Patent document CN209610902U discloses an angle control device for a folding food grill, and discloses the positions of the upper grill plate assembly in a closed, upright, and flat position. In use, the user holds the handle and raises their arm to adjust the position of the upper grill plate. Because the upper grill plate is relatively heavy, adjusting its position is quite strenuous for the user. Summary of the Invention

[0003] This invention addresses the drawback of existing grills where it is laborious to lift the arm to adjust the position of the upper grill pan, by providing a labor-saving lifting arm structure and a grill.

[0004] To achieve the above objectives, the lifting arm labor-saving structure of the present invention includes: Supporting components, which are fixedly configured; An arm is rotatably mounted on a support member to rotate to a first position, a second position, or a third position. The second position is located between the first and third positions. When the arm is in the first and third positions, it is in a horizontal position. When the arm is in the second position, it is in an upright position. Its features also include: A spring is disposed at the assembly point of the arm and the support member and acts on the arm and the support member. When the arm rotates between the first position and the second position and between the second position and the third position, the spring applies a spring force to the arm in the direction of the second position to save effort when lifting the arm.

[0005] Regardless of whether the arm rotates between the first and second positions or between the second and third positions, the spring force of this lifting arm structure can offset part of the weight of the arm and the structure attached to the arm (such as the baking tray above), thus achieving the effect of saving effort.

[0006] Preferably, the spring stores force during the rotation of the arm from the second position to the first position and from the second position to the third position. That is, the spring storage force is minimal when the arm is in the second position. Since the arm is in an upright state when it is in the second position, the torque exerted on the arm by gravity decreases during the rotation of the arm from the first or third position to the second position, and the corresponding spring force on the arm also decreases. Therefore, the effort-saving degree tends to be consistent when the arm rotates between the first and second positions or between the second and third positions, making it easier for the user to operate.

[0007] Preferably, the spring is a helical torsion spring, which has a helical segment and a first end extending from one end of the helical segment and a second end extending from the other end of the helical segment. During the rotation of the arm from the second position to the first position and from the second position to the third position, the helical torsion spring is wound and stored by the relative compression of the first and second ends by the arm and the supporting member. The structure of the helical torsion spring is suitable for the rotating assembly structure of the arm and the supporting member, making the structure compact. Here, "winding" refers to increasing the number of helical turns of the helical torsion spring by relative compression of the first and second ends, thereby achieving the purpose of storing force. Accordingly, during the rotation of the arm from the second position to the first position and from the second position to the third position, the elastic force of the helical torsion spring on the arm is the same, and the magnitude of the elastic force generated is relatively consistent, which is beneficial for the user to lift the arm with a consistent level of effort.

[0008] Preferably, the assembly part between the arm and the support member has a shaft segment, and a helical segment is fitted onto the shaft segment. Accordingly, the helical torsion spring is positioned to maintain its elastic force.

[0009] Preferably, a limiting cap is included at the end of the shaft segment, and the helical segment is limited by the limiting cap within the shaft segment. Accordingly, the helical torsion spring is axially positioned.

[0010] Preferably, the arm is axially constrained by the limiting cover to a position where it is rotatably assembled with the support member. This ensures the rotational relationship between the arm and the support member.

[0011] Preferably, the limiting cover is fixedly assembled to the arm. The limiting cover has a rod segment, and the supporting member has a hole and a wall located at one end of the hole. The rod segment is inserted into the hole and rotatably engages with the hole. A fastener is connected to the end of the rod segment and is located on the side of the wall, separate from the limiting cover. This allows the limiting cover to rotate together with the arm.

[0012] Preferably, the arm has a through hole, with the first end and the second end located on opposite axial sides of the through hole. This reduces the space occupied by the spring, resulting in a more compact structure.

[0013] Preferably, the support member has a first fixed support portion and a second fixed support portion, the arm has a first rotating support portion and a second rotating support portion, the first end of the spring and the first fixed support portion are located in the rotational stroke of the second rotating support portion, and the second end of the spring and the second fixed support portion are located in the rotational stroke of the first rotating support portion; During the rotation of the arm from the first position to the second position, the first end of the spring rests against the first fixed support and the second end of the spring rests against the first rotating support. The second end of the spring applies a spring force to the first rotating support to cause the arm to rotate from the first position to the second position. During the rotation of the arm from the second position to the third position, the first end of the spring moves to rest against the second rotating support and the second end of the spring moves to rest against the second fixed support. The second rotating support compresses the first end of the spring to wind and store force in the helical torsion spring. During the rotation of the arm from the third position to the second position, the first end of the spring rests against the second rotating support and the second end of the spring rests against the second fixed support. The first end of the spring applies a spring force to the second rotating support to cause the arm to rotate from the third position to the second position. During the rotation of the arm from the second position to the first position, the first end of the spring moves to rest against the first fixed support and the second end of the spring moves to rest against the first rotating support. The first rotating support compresses the second end of the spring to wind and store force in the helical torsion spring.

[0014] This structure causes the first and second rotating support parts to rotate and change their positions by rotating the arm, thereby altering their positional relationship with the first and second fixed support parts and changing the direction of the spring force. This allows the spring to store force during the process of the arm rotating from the second position to the first position and from the second position to the third position, thus saving effort during the process of lifting the arm from the first position to the second position and from the third position to the second position.

[0015] The grilling apparatus of the present invention includes: The base has a lower baking tray mounted on it. The lifting lever includes a handle and two arms extending in the same direction from both ends of the handle. The two arms are rotatably configured relative to the base, and a baking tray is mounted between the two arms to adjust the position of the upper baking tray by rotating the lifting lever. Its characteristic is that at least one arm and base are rotated and assembled in the manner described in the arm-lifting, force-saving structure, and the supporting member is fixed to the base. This reduces effort when changing the position of the upper baking tray by lifting the arm.

[0016] This invention involves rotating an arm to a fixed support member to move it to a first, second, or third position. The second position is located between the first and third positions. In the first and third positions, the arm is in a horizontal position, while in the second position, it is in an upright position. A spring is placed at the connection point between the arm and the support member. The spring acts on both the arm and the support member, applying a spring force towards the second position when the arm rotates between the first and second positions, and between the second and third positions, thus reducing effort when lifting the arm. This effort-saving lifting structure ensures that the spring force counteracts a portion of the weight of the arm and its attached structure (such as the baking pan), regardless of whether the arm rotates between the first and second positions or between the second and third positions, achieving a labor-saving effect. Attached Figure Description

[0017] Figure 1 This is a side orthographic projection of the grilling apparatus of the present invention; Figure 2 for Figure 1 KK-direction cross-section; Figure 3 for Figure 2 Enlarged view of part A; Figure 4 This is a schematic diagram of the spring structure of the present invention; Figure 5 This is a schematic diagram showing the lifting arm labor-saving structure of the present invention disassembled from the grill; Figure 6 This is a schematic diagram showing a structural breakdown of the lifting arm force-saving structure of the present invention. Figure 7 This is a schematic diagram showing another perspective of the structural decomposition of the lifting arm force-saving structure of the present invention; Figure 8 This is a schematic diagram of the lifting arm-saving structure of the present invention when the arm is in the first position; Figure 9 for Figure 8 A schematic diagram showing the disassembled state of the arm, spring, and support components as shown. Figure 10 This is a schematic diagram of the lifting arm-saving structure of the present invention when the arm is in the second position; Figure 11 for Figure 10 A schematic diagram showing the disassembled state of the arm, spring, and support components as shown. Figure 12 This is a schematic diagram of the lifting arm-saving structure of the present invention when the arm is in the third position; Figure 13 for Figure 12 A schematic diagram showing the disassembled state of the arm, spring, and support components as shown. Explanation of the labels in the diagram: 100 bases; Baking pan at 200 degrees Celsius; 300 lifting lever, 310 handle; 400 on a baking tray; 510 First decorative cover, 520 Second decorative cover; 600 lifting arm labor-saving structure, 610 Supporting component, 611 First fixed support part, 612 Second fixed support part, 613 Shaft segment, 614 Hole, 615 Wall, 616 Annular groove 620 Arm, 621 First Rotating Support, 622 Second Rotating Support, 623 Through Hole 630 Spring, 631 First end, 632 Second end, 633 Helical segment. 640 Limiting cap, 641 Rod section, 642 Fastener. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0019] The terms “comprising” and “having”, and any variations thereof, used in the specification and claims of this invention are intended to cover a non-exclusive inclusion, such as a method or product that includes a series of technical features, not necessarily limited to those technical features explicitly listed, but may also include other technical features that may be included in the method or product but not explicitly listed.

[0020] In the description of this invention, it should be understood that the technical features defined by terms such as "first" and "second" which have a sequential concept are only used to clearly describe the defined technical features and to clearly distinguish the defined technical features from other technical features, and do not represent that they are named in this way in actual implementation. Therefore, they should not be construed as limitations on this invention.

[0021] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0022] Figure 1-2 , Figure 5 A grill is shown, which includes a base 100 and a lifting rod 300.

[0023] A lower baking tray 200 is mounted on the base 100. The lifting lever 300 includes a handle 310 and two arms 620 extending in the same direction from both ends of the handle. The two arms 620 are rotatably configured relative to the base 100. In the structure described below, the rotation of the arms 620 relative to the base 100 is manifested as rotation of the arms relative to the supporting member. An upper baking tray 400 is mounted between the two arms 620 to adjust the position of the upper baking tray by rotating the lifting lever 300. The position of the upper baking tray 400 can be adjusted to the same closed position, upright position, and flat position as in the prior art.

[0024] Furthermore, both arms 620 of the grill are equipped with lifting arm-saving structures 600 at their rotatable assembly with the base 100, which reduces effort when changing the position of the upper baking tray by lifting the arms 620. In the illustrated structure, the two lifting arm-saving structures 600 are arranged axially symmetrically. Since the lifting rod is a single unit, in other embodiments, a lifting arm-saving structure may be configured only at the rotatable assembly of one arm with the base.

[0025] like Figure 8-9 , Figure 10-11 and Figure 12-13 As shown, the lifting arm labor-saving structure 600 includes a support member 610, an arm 620, and a spring 630.

[0026] Support member 610 is fixedly configured. Figure 1-2 , Figure 5 In the grill shown, the support member 610 is fixedly assembled to the base 100 by fasteners such as screws.

[0027] Arm 620 is rotatably mounted on support member 610 for rotation to Figure 8-9 The first position shown Figure 10-11 The second position shown or Figure 12-13 The third position is shown. The second position is between the first and third positions. When the arm 620 is in the first and third positions, it is in a flat position; when the arm is in the second position, it is in an upright position. Regarding the grill, the first position corresponds to the closed position of the upper baking pan 400; the second position corresponds to the upright position of the upper baking pan 400; and the third position corresponds to the flat position of the upper baking pan 400. Therefore, the arm 620 can rotate from the first position to the second position, or it can rotate directly from the first position through the second position to the third position. Conversely, the arm can rotate from the third position to the second position, or it can rotate directly from the third position through the second position to the first position.

[0028] When arm 620 rotates between the first and second positions and between the second and third positions, since the upper baking tray is mounted between the two arms, therefore, as Figure 1The lever arm L, which forms the gravitational force between the axis of rotation of the arm and the supporting member (this position is called the pivot point) and the center of gravity of the upper baking pan and the lifting rod, is shown. This lever arm L is maximum when the arm is in the first and third positions, and decreases when the arm is in the second position. Theoretically, when the center of gravity of the upper baking pan and the lifting rod is in the same vertical plane as the pivot point, the lever arm is 0. However, in order to use gravity to keep the upper baking pan in an upright position, the lever arm L is usually kept at a small value, that is, the arm 620 is slightly deflected from the position where the lever arm is 0 towards the third position.

[0029] As described above, whether the arm is rotated between the first and second positions or between the second and third positions by holding the handle 310, the torque generated by gravity must be overcome to prevent the lifting lever and the upper baking tray from becoming uncontrollable. Therefore, when adjusting the position of the upper baking tray by lifting the arm 620, the torque generated by gravity becomes a burden for the operator. To alleviate this burden, the lifting arm effort-saving structure 600 also includes a spring 630, which is disposed at the assembly point of the arm 620 and the support member 610 and acts on the arm 620 and the support member 610. Furthermore, when the arm 620 rotates between the first and second positions and between the second and third positions, the spring 630 applies a spring force to the arm 620 in the direction of the second position to save effort when lifting the arm. Regardless of whether the arm rotates between the first and second positions or between the second and third positions, and whether the rotation of the arm is a rotation to raise or lower the upper baking tray, the spring force can offset part of the gravity, achieving the effect of saving effort.

[0030] Furthermore, when the upper baking pan clamps the food placed on the lower baking pan for grilling, the spring force offsets part of the weight of the upper baking pan, thus reducing the pressure of the upper baking pan on the food. This prevents the food from being excessively pressed and deformed by the upper baking pan, and also prevents the fluids in the food, such as cheese, from being squeezed out.

[0031] The above structure embodies the basic concept of the present invention, enabling the realization of the technical solution of the present invention. To further improve the technical solution, based on the above structure, the following preferred technical means can be selected to obtain better embodiments.

[0032] Firstly, arm 620 from Figure 10-11 The second position shown Figure 8-9 During the rotation from the first position shown, and from Figure 10-11 The second position shown Figure 12-13During the rotation to the third position shown, spring 630 stores force. That is, when arm 620 is in the second position, the force stored in spring 630 is minimal, for example, zero. Since arm 620 is in an upright state when in the second position, the torque L exerted on the arm by gravity decreases as arm 620 rotates from the first or third position to the second position. Consequently, the elastic force of spring 630 on arm 620 also decreases. Therefore, the effort required to rotate the arm between the first and second positions, or between the second and third positions, tends to be consistent, making it easier for the user to control and preventing inconsistent force application.

[0033] Secondly, such as Figure 4 As shown, spring 630 is a helical torsion spring, having a helical segment 633, a first end 631 extending from one end of the helical segment, and a second end 632 extending from the other end of the helical segment. Arm 620 from Figure 10-11 The second position shown Figure 8-9 During the rotation from the first position shown, and from Figure 10-11 The second position shown Figure 12-13 During the rotation in the third position shown, the helical torsion spring is wound and stores force by the relative compression of the first end 631 and the second end 632 by the arm 620 and the support member 610. The structure of the helical torsion spring is suitable for the rotating assembly structure of the arm and the support member, making the structure compact. The winding refers to increasing the number of spiral turns in the helical segment by relative compression of the first end 631 and the second end 632, thereby achieving the purpose of storing force. Furthermore, the increase in the number of spiral turns is not an integer number of turns but only an angle. Therefore, during the rotation of the arm between the second and first positions and between the second and third positions, the elastic force exerted by the helical torsion spring on the arm is the same, producing a consistent elastic force, preventing fluctuations in force and allowing the user to lift the arm with a consistent level of effort.

[0034] Thirdly, such as Figure 9 , Figure 11 , Figure 13 As shown, the assembly portion of arm 620 and support member 610 has a shaft segment 613, which is located on support member 610. An axially extending annular groove 616 is formed on the periphery of shaft segment 613, and helical segment 633 is fitted onto shaft segment 613 and located in annular groove 616. Accordingly, the helical torsion spring is positioned to maintain its elastic force.

[0035] Fourth, such as Figure 3 , Figure 5-7 As shown, the lifting arm force-saving structure 600 includes a limiting cover 640 located at the end of the shaft segment 613, and the helical segment 633 is limited by the limiting cover 640 to the shaft segment 613. Accordingly, the helical torsion spring is axially positioned.

[0036] Fifth, such as Figure 3 , Figure 5-7 As shown, the arm 620 is axially constrained by the limiting cover 640 to a position where it is rotatably assembled with the support member 610. This ensures the rotational relationship between the arm and the support member.

[0037] Sixth, such as Figure 3 , Figure 5-7 As shown, the limiting cover 640 is fixedly assembled to the arm 620 by pins and fasteners. The limiting cover 640 has a rod segment 641, and the supporting member 610 has a hole 614 and a wall 615 located at one end of the hole. The rod segment 641 is inserted into the hole 614 and rotatably engages with the hole. A fastener 642 is connected to the end of the rod segment 641 and is located on the side of the wall 615, separate from the limiting cover 640. This allows the limiting cover to rotate together with the arm.

[0038] Seventh, such as Figure 8-9 , Figure 10-11 , Figure 12-13 As shown, arm 620 has a through hole 623, with a first end 631 and a second end 632 located on opposite axial sides of the through hole 623. This reduces the space occupied by the spring, making the structure more compact, and constrains the first and second ends of the spring.

[0039] Eighth, such as Figure 8-9 , Figure 10-11 , Figure 12-13 As shown, the support member 610 has a first fixed support portion 611 and a second fixed support portion 612, the arm 620 has a first rotating support portion 621 and a second rotating support portion 622, the first end 631 of the spring and the first fixed support portion 611 are located in the rotational stroke of the second rotating support portion 622, and the second end 632 of the spring and the second fixed support portion 612 are located in the rotational stroke of the first rotating support portion 621.

[0040] Arm 620 from Figure 8-9 The first position shown Figure 10-11 During the rotation to the second position shown, the first end 631 of the spring rests against the first fixed support 611, and the second end 632 of the spring rests against the first rotating support 621. The second end 632 of the spring applies a spring force to the first rotating support 621, causing the arm to rotate from the first position to the second position; the arm 620 then rotates from... Figure 10-11 The second position shown Figure 12-13 During the rotation of the third position shown, the first end 631 of the spring moves to rely on the second rotating support 622, and the second end 632 of the spring moves to rely on the second fixed support 612. The second rotating support 622 squeezes the first end 631 of the spring to wind and store force on the helical torsion spring.

[0041] Arm 620 from Figure 12-13 The third position shown Figure 10-11During the rotation to the second position shown, the first end 631 of the spring rests against the second rotation support 622, and the second end 632 of the spring rests against the second fixed support 612. The first end 631 of the spring applies a spring force to the second rotation support 622, causing the arm to rotate from the third position to the second position; the arm 620 then rotates from... Figure 10-11 The second position shown Figure 8-9 During the rotation of the first position shown, the first end 631 of the spring moves to rely on the first fixed support 611, and the second end 632 of the spring moves to rely on the first rotating support 621. The first rotating support 621 squeezes the second end 632 of the spring to wind and store force on the helical torsion spring.

[0042] Among them, arm 620 is located Figure 10-11 In the second position shown, the first and second ends of the spring are not compressed or wound, and the spring has no stored force.

[0043] This structure causes the first rotating support 621 and the second rotating support 622 to rotate and change position by rotating the arm 620. By changing the positional relationship between the first rotating support 621 and the second rotating support 622 and the first fixed support 611 and the second fixed support 612, the direction of the spring force is changed. This allows the spring to store force during the rotation of the arm from the second position to the first position and from the second position to the third position, thereby saving effort during the rotation of the arm between the first and second positions and between the third and second positions.

[0044] In order to maintain the regularity of the assembly structure, a first decorative cover 510 is fastened on the arm to cover the spring 630 and the limiting cover, and a second decorative cover 520 is fastened on the base at the position corresponding to the fastener 642 to cover the fastener 642.

Claims

1. Arm-raising force-saving structure, including: Supporting member (610), which is fixedly configured; An arm (620) is rotatably mounted on a support member (610) to rotate to a first position, a second position, or a third position. The second position is located between the first and third positions. When the arm is in the first and third positions, it is in a horizontal position. When the arm is in the second position, it is in an upright position. Its features also include: A spring (630) is disposed at the assembly point of the arm (620) and the support member (610) and acts on the arm (620) and the support member (610). When the arm (620) rotates between the first position and the second position and between the second position and the third position, the spring (630) applies a spring force to the arm (620) in the direction of the second position to save effort when lifting the arm.

2. The lifting arm labor-saving structure according to claim 1, characterized in that: During the rotation of the arm (620) from the second position to the first position and from the second position to the third position, the spring (630) stores force.

3. The lifting arm labor-saving structure according to claim 2, characterized in that: The spring (630) is a helical torsion spring, which has a helical segment (633) and a first end (631) extending from one end of the helical segment and a second end (632) extending from the other end of the helical segment. During the rotation of the arm (620) from the second position to the first position and from the second position to the third position, the arm (620) and the support member (610) press the first end (631) and the second end (632) relative to each other to wind and store force on the helical torsion spring.

4. The lifting arm labor-saving structure according to claim 3, characterized in that: The assembly part of the arm (620) and the support member (610) has a shaft section (613) and a spiral section (633) sleeved on the shaft section (613).

5. The lifting arm labor-saving structure according to claim 4, characterized in that: Includes a limiting cap (640) located at the end of the shaft segment (613), and the spiral segment (633) is limited by the limiting cap (640) to the shaft segment (613).

6. The lifting arm labor-saving structure according to claim 4, characterized in that: The arm (620) is axially constrained by the limiting cover (640) in a position where it is rotatably assembled with the support member.

7. The grilling apparatus according to claim 6, characterized in that: The limiting cover (640) is fixedly assembled to the arm (620). The limiting cover (640) has a rod segment (641). The supporting member (610) has a hole (614) and a wall (615) located at one end of the hole. The rod segment (641) is inserted into the hole (614) and rotates with the hole. A fastener (642) is connected to the end of the rod segment (641) and is located on the side of the wall (615) of the limiting cover (640).

8. The lifting arm labor-saving structure according to claim 3, characterized in that: The arm (620) has a through hole (623), with the first end (631) and the second end (632) located on the axial sides of the through hole (623).

9. The lifting arm labor-saving structure according to any one of claims 3-8, characterized in that: The support member (610) has a first fixed support part (611) and a second fixed support part (612), and the arm (620) has a first rotating support part (621) and a second rotating support part (622). The first end (631) of the spring and the first fixed support part (611) are located in the rotational stroke of the second rotating support part (622), and the second end (632) of the spring and the second fixed support part (612) are located in the rotational stroke of the first rotating support part (621). During the rotation of the arm (620) from the first position to the second position, the first end (631) of the spring rests on the first fixed support (611), and the second end (632) of the spring rests on the first rotating support (621). The second end (632) of the spring applies a spring force to the first rotating support (621) to cause the arm (620) to rotate from the first position to the second position. During the subsequent rotation of the arm (620) from the second position to the third position, the first end (631) of the spring moves to rest on the second rotating support (622), and the second end (632) of the spring moves to rest on the second fixed support (612). The second rotating support (622) squeezes the first end (631) of the spring to wind and store force on the helical torsion spring. During the rotation of the arm (620) from the third position to the second position, the first end (631) of the spring rests on the second rotating support (622), and the second end (632) of the spring rests on the second fixed support (612). The first end (631) of the spring applies elastic force to the second rotating support (622) to cause the arm (620) to rotate from the third position to the second position. During the subsequent rotation of the arm (620) from the second position to the first position, the first end (631) of the spring moves to rest on the first fixed support (611), and the second end (632) of the spring moves to rest on the first rotating support (621). The first rotating support (621) squeezes the second end (632) of the spring to wind and store force on the helical torsion spring.

10. Grilling apparatus, including: A base (100) on which a lower baking tray (200) is mounted; The lifting lever (300) includes a handle (310) and two arms (620) extending in the same direction from both ends of the handle. The two arms (620) are rotatably configured relative to the base. A baking tray (400) is mounted between the two arms (620) to adjust the position of the upper baking tray by rotating the lifting lever. Its characteristics are: At least one arm (620) is rotatably assembled with the base (100) as the lifting arm labor-saving structure (600) according to any one of claims 1-9, wherein the support member (610) is fixed to the base (100).

Images