Pressure Cooker

Abstract

A pressure cooker comprises: a pot body (1) having a lower handle (11); a pot cover (2) connected to the pot body (1) in a screw-fitting manner, and an upper handle (21) is provided on the pot cover (2); at least two protrusions (5) are arranged on the top surface of the lower handle (11) at intervals on the left and right, and a limit groove (50) is formed between the protrusions (5) arranged at intervals on the left and right; a locking member (6) is arranged on the upper handle (21) so as to be movable forward and backward; a first elastic member acts on the locking member (6) so that the locking member (6) always has a tendency to move backward; a self-locking block (8) is arranged on the upper handle (21) so as to be rotatable left and right and is located on the left or right side of the locking member (6); a second elastic member (9) acts on the self-locking block (8) so that the self-locking block (8) always has a tendency to rotate in the direction where the locking member (6) is located. The structure of the application is stable and can realize fast and safe opening and closing of the lid.

Description

Technical Field

[0001] The invention belongs to the technical field of kitchen cooking utensils, and in particular relates to a pressure cooker. Background Art

[0002] Pressure cookers usually include a pot body and a pot cover. During the use of the pressure cooker, the high pressure inside the pot body may cause certain safety problems, such as safety accidents caused by improper opening and closing of the pot cover. Therefore, the opening and closing structure of the pressure cooker is particularly important.

[0003] The utility model patent "Safety Opening and Closing Structure of Pressure Cooker" (authorization announcement number CN2537315Y) with patent number CN02216777.3 discloses a structure including a stop valve, a safety valve and a self-locking mechanism installed on the pot cover. The stop valve is provided with a stop valve stem which can rise and fall with the pressure in the pot. The self-locking mechanism is composed of a push plate, a safety plate, a safety spring supported on the safety plate and a guide spring supported on the sliding foot installed on the upper handle. The lower end of the sliding foot is placed in the guide groove of the lower handle, and a positioning platform is provided at the end of the guide groove. A safety hole and a self-locking hole are opened on the safety plate. When the pot cover is fully closed, the self-locking hole and the safety hole are respectively opposite to the stop valve stem and the safety valve. When the pot cover is in an unclosed state, the safety plate presses the safety valve to form a gap between it and the pot cover. When the pot lid needs to be opened, the push plate is pushed forward, and the sliding foot falls on one side of the positioning platform. The push plate can automatically stop without moving back. At this time, the safety plate moves forward to press the safety valve, causing a gap between the safety valve and the pot lid and deflation, so that there is no pressure in the pot during the lid opening process. The operator can release the push plate and hold the handle with both hands to easily open the pot lid, which has the advantage of a high safety factor. In order to prevent the push plate from moving forward and then moving back when opening the lid, the patent adopts a structure in which a one-way stop column is set on the positioning platform. However, when closing the lid, the push plate needs to overcome the resistance of the one-way stop column to move backward, and after repeated use, the one-way stop column and the lower end of the sliding foot will be worn, thereby affecting the stability of the structure. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a pressure cooker with a stable structure and capable of opening and closing a lid quickly and safely in view of the current status of the prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a pressure cooker, comprising:

[0006] a pot body, on which a lower handle is provided;

[0007] A pot cover, which is arranged on the pot body and is screwed together with the pot body, and the pot cover is provided with an upper handle matching with the lower handle;

[0008] It is characterized by also including:

[0009] At least two protrusions are arranged on the top surface of the lower handle at intervals on the left and right sides, and a limiting groove is formed between the protrusions arranged at intervals on the left and right sides;

[0010] The locking member is arranged on the upper handle so as to be movable forward and backward. A limiting block matching the limiting groove is arranged on the bottom of the locking member. The limiting block is disengaged from the limiting groove after the locking member moves forward, so that the pot cover can be unscrewed to open the pot cover. At least a part of the locking member is exposed outside the upper handle and can move forward and backward relative to the upper handle.

[0011] a first elastic member, acting on the locking member so that the locking member always has a tendency to move backward;

[0012] The self-locking block is rotatably arranged on the upper handle and is located on the left or right side of the locking member. When the pot lid is screwed on to close the lid, the self-locking block abuts against the protrusion and rotates away from the locking member under the action of the protrusion, so that the locking member can move backward. When the pot lid is unscrewed to open the lid, the self-locking block is separated from the protrusion and rotates in the direction of the locking member to abut against the locking member, thereby preventing the locking member from moving backward.

[0013] The second elastic member acts on the self-locking block so that the self-locking block always has a tendency to rotate toward the direction where the locking member is located.

[0014] In order to make the self-locking block cooperate better with the locking piece, the top of the self-locking block is rotatably connected to the upper handle through a pin shaft, and the bottom has a step that cooperates with the protrusion. The side of the locking piece opposite to the self-locking block is provided with a recess for the self-locking block to be inserted into after rotation.

[0015] Furthermore, the wall surface of the notch opposite to the self-locking block is arranged to be inclined, so that the self-locking block can better fit the locking piece after rotating, and prevent the locking piece from moving backwards.

[0016] The second elastic member includes a torsion spring and / or a second spring. The torsion spring is sleeved on the pin shaft, and the second spring abuts between the self-locking block and the upper handle.

[0017] In order to meet the habit of most users to open the lid with their right hand, the self-locking block is located on the right side of the locking member, and the step on the bottom of the self-locking block can abut against the right side wall of the protrusion located on the right side. In this way, the lid can be opened by manually driving the locking member to move forward and disengage from the limiting groove, and then turning the pot lid to the right. When the pot lid is turned to the right, the self-locking block is away from the protrusion, so that the self-locking block rotates in the direction where the locking member is located under the action of its second elastic member, and then abuts against the locking member to prevent the locking member from moving backward; when closing the lid, the pot lid is turned to the left, and the step on the bottom of the self-locking block can contact the protrusion, and under the action of the protrusion, it rotates in the direction away from the locking member, so that the self-locking block is separated from the locking member, and the locking member can move backward under the action of the first elastic member.

[0018] In order to prevent the lid from being opened when there is pressure in the pot and further improve the safety of use, preferably, it also includes a float safety valve arranged on the pot cover, and the valve cap of the float safety valve passes through the pot cover and can move up and down relative to the pot cover; the front part of the locking member cooperates with the valve cap of the float safety valve, so that the valve cap of the float safety valve can block the locking member from moving forward after moving upward.

[0019] Further, the front part of the locking member has an opening, the valve cap of the float safety valve includes a body and a flange convexly arranged on the lower part of the body, the outer diameter of the body is smaller than the caliber of the opening, the outer diameter of the flange is larger than the caliber of the opening, the flange is located in front of the opening after the valve cap of the float safety valve moves upward, and the body is located in front of the opening after the valve cap of the float safety valve falls. In this way, when there is pressure in the pot, the valve cap of the float safety valve moves upward, and the flange blocks the front of the opening of the locking member, so that the locking member cannot move forward, and thus the lid cannot be opened. When there is no pressure in the pot or the pressure is reduced to a safe range, the valve cap of the float safety valve falls, the body is located in front of the opening of the locking member, and the locking member can move forward, and thus the lid can be opened. And the locking piece can automatically move backwards only after the lid is closed, so that the front part of the locking piece leaves the float safety valve on the pot cover. At this time, the float safety valve can work normally. In this way, it can be ensured that the float safety valve works normally only when the pressure cooker is in the lid-closed state, thereby further improving the safety of the pressure cooker.

[0020] In the above solution, the first elastic member includes a first spring, and two ends of the first spring are respectively abutted between the pot cover and the locking member.

[0021] Preferably, it also includes a sealing ring installed in the pot cover, a guide column is protruding from the locking member, the first spring is sleeved on the guide column, and a through hole is opened on the pot cover for the end of the guide column to pass through, the through hole is opposite to the sealing ring, and the aperture of the through hole is smaller than the outer diameter of the first spring. The guide column can position the first spring to prevent the first spring from being misplaced; at the same time, when the lid is opened, the locking member is moved forward, and the end of the guide column can move forward and pass through the through hole on the pot cover, and then support the sealing ring in the pot cover, so that the sealing ring loses its seal, thereby improving the safety of use and the convenience of opening the lid; and the aperture of the through hole is smaller than the outer diameter of the first spring so that the first spring can stably abut between the pot cover and the locking member.

[0022] Further preferably, the guide post is a tapered structure, and the end portion of the guide post is a small end of the tapered structure, so that the end portion of the guide post can be smoothly inserted into the through hole.

[0023] Compared with the prior art, the advantages of the present invention are as follows: by providing a protrusion, a locking piece and a first elastic piece, the lid can be opened only by moving the locking piece forward, thereby improving the safety of the pressure cooker; by providing a self-locking block and a second elastic piece, the locking piece will not move backward under the action of the first elastic piece after the lid is opened, but will automatically move backward and get stuck between the two protrusions after the lid is closed, thereby avoiding the user from moving the locking piece again when closing the lid, thereby improving the convenience of use; and in the present application, the self-locking block is rotatably connected to the upper handle of the pot cover, and the pot cover is screwed together with the pot body. By rotating the pot cover, the position of the self-locking block can be controlled, so that the self-locking block is close to or away from the locking piece, thereby controlling the position of the locking piece, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a pressure cooker in a lid-closed state according to an embodiment of the present invention;

[0025] Figure 2 is a cross-sectional view of a pressure cooker in a lid-closed state according to an embodiment of the present invention;

[0026] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0027] Figure 4 Schematic diagram of the structure of the pressure cooker in the embodiment of the present invention when the lid is closed (the upper handle is omitted);

[0028] Figure 5 for Figure 4 Enlarged view of middle part B;

[0029] Figure 6 is a structural schematic diagram of the pressure cooker in another perspective when the lid is closed according to an embodiment of the present invention (the upper handle is omitted);

[0030] Figure 7 for Figure 6 Enlarged view of the middle C part;

[0031] Figure 8 for Figure 1 Schematic diagram of the structure of the middle pot lid (without the upper handle);

[0032] Fig. 9 for Figure 8 Enlarged view of the middle D part;

[0033] Fig.10 It is a structural schematic diagram of a pressure cooker in an embodiment of the present invention in a state where the cover is opened;

[0034] Fig.11 Schematic diagram of the structure of the pressure cooker in the embodiment of the present invention with the lid opened (the upper handle is omitted);

[0035] Fig.12 for Fig.11 Enlarged view of the middle E part;

[0036] Fig.13 is a structural schematic diagram of the pressure cooker in the embodiment of the present invention in the open lid state from another viewing angle (the upper handle is omitted);

[0037] Fig.14 for Fig.13 Enlarged view of the middle F part;

[0038] Fig.15 for Fig.10 Schematic diagram of the structure of the middle pot lid (with the upper handle omitted);

[0039] Fig.16 for Fig.15 Enlarged view of the middle G section. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below with reference to the accompanying drawings.

[0041] like Figures 1 to 16 FIG. 1 is a preferred embodiment of the pressure cooker of the present invention. The pressure cooker comprises a pot body 1, a pot cover 2, a float safety valve 3, a pressure limiting valve 4 and a safety opening and closing structure.

[0042] The pot body 1 is provided with a lower handle 11, the pot cover 2 is provided on the pot body 1 and is screwed together with the pot body 1, the pot cover 2 is provided with an upper handle 21 that matches the lower handle 11, and a sealing ring 22 is installed in the pot cover 2. The screw-on connection structure between the pot cover 2 and the pot body 1 in this embodiment can refer to the prior art. When the pot cover 2 needs to be opened, the pot cover 2 is rotated counterclockwise, and vice versa, the pot cover 2 can be closed by rotating it clockwise.

[0043] The float safety valve 3 is mounted on the pot cover 2, and its structure includes a valve body assembly 31 and a valve cap 32. The valve body assembly 31 is mounted on the pot cover 2, and the valve cap 32 passes through the pot cover 2 and can move up and down relative to the pot cover 2. The valve cap 32 is in a convex shape as a whole, and includes a body 321 and a flange 322 convexly arranged on the lower part of the body 321. The structure of the valve body assembly 31 and the connection structure between the valve body assembly 31, the valve cap 32 and the pot cover 2 in this embodiment are the same as those in the prior art, and are not described in detail here.

[0044] The specific structure of the pressure limiting valve 4 and the connection structure between the pressure limiting valve 4 and the pot cover 2 can refer to the prior art and will not be described in detail here.

[0045] In this embodiment, the safety opening and closing structure includes two protrusions 5 , a locking member 6 , a first elastic member, a self-locking block 8 , and a second elastic member 9 .

[0046] Among them, two protrusions 5 are arranged on the top surface of the lower handle 11 at intervals on the left and right, and a limiting groove 50 is formed between the protrusions 5 distributed at intervals on the left and right.

[0047] The locking piece 6 is arranged on the upper handle 21 so as to be movable forward and backward. A limiting block 61 matching with the limiting groove 50 is arranged on the bottom of the locking piece 6. The limiting block 61 disengages from the limiting groove 50 after the locking piece 6 moves forward, so that the pot cover 2 can be loosened counterclockwise to open the cover; the front part of the locking piece 6 cooperates with the valve cap 32 of the float safety valve 3, so that the valve cap 32 of the float safety valve 3 can block the locking piece 6 from moving forward after it moves upward. Specifically, the front part of the locking piece 6 has an opening 62, the outer diameter of the body 321 of the valve cap 32 is smaller than the caliber of the opening 62, the outer diameter of the flange 322 of the valve cap 32 is larger than the caliber of the opening 62, the flange 322 is located at the front side of the opening 62 after the valve cap 32 of the float safety valve 3 moves upward, and the body 321 is located at the front side of the opening 62 after the valve cap 32 of the float safety valve 3 falls. Furthermore, when there is pressure in the pot, the valve cap 32 moves upward to block the locking member 6 from moving forward, so that the pot cover 2 cannot be opened. Only when the pressure in the pot is reduced and the valve cap 32 falls, the locking member 6 can be moved forward to open the lid. In order to facilitate the user to move the locking member 6, at least a part of the locking member 6 is exposed outside the upper handle 21 and can move forward and backward relative to the upper handle 21. Specifically, the top of the locking member 6 is a push plate 63, which is exposed outside the upper handle 21 and can move forward and backward along the upper handle 21. The user can drive the locking member 6 to move forward by pushing the push plate 63 forward. The push plate 63 and the locking member 6 can be an integral part or a combined connection part.

[0048] In this embodiment, a guide post 64 is convexly provided on the locking member 6 in the front-back direction, and the guide post 64 is a tapered structure, and the terminal end of the guide post 64 is a small end of the tapered structure. The first elastic member is selected from the first spring 7, and the first spring 7 is sleeved on the guide post 64, and the two ends of the first spring 7 are respectively abutted between the pot cover 2 and the locking member 6, so that the locking member 6 always has a tendency to move backward. In this embodiment, the terminal end of the guide post 64 faces the pot cover 2, and a through hole 20 for the terminal end of the guide post 64 to pass through is correspondingly provided on the pot cover 2. The through hole 20 is opposite to the sealing ring 22. The terminal end of the guide post 64 passes through the through hole 20 as the locking member 6 moves forward, and then can support the sealing ring in the pot cover when opening the cover, so that the sealing ring loses its sealing, thereby improving the safety of use and the convenience of opening the cover. In order to prevent the first spring 7 from passing through the through hole 20, the aperture of the through hole 20 is smaller than the outer diameter of the first spring 7.

[0049] The self-locking block 8 is rotatably arranged on the upper handle 21 and is located on the right side of the locking member 6. When the pot cover 2 is screwed on to close the lid, the self-locking block 8 abuts against the protrusion 5 and rotates away from the locking member 6 under the action of the protrusion 5, so that the locking member 6 can move backwards. When the pot cover 2 is unscrewed to open the lid, the self-locking block 8 is disengaged from the protrusion 5 and rotates in the direction of the locking member 6 to abut against the locking member 6, preventing the locking member 6 from moving backwards. The second elastic member 9 acts on the self-locking block 8 so that the self-locking block 8 always has a tendency to rotate in the direction of the locking member 6. Specifically:

[0050] The top of the self-locking block 8 is rotatably connected to the upper handle 21 via a pin 81, and the bottom has a step 82 that matches the protrusion 5 on the right side, and the step 82 can abut against the right side wall of the protrusion 5 on the right side. In order to make the self-locking block 8 abut against the locking member 6 and prevent the locking member 6 from moving backward, the side of the locking member 6 opposite to the self-locking block 8 is provided with a notch 65 for the self-locking block 8 to be inserted after rotation, and the wall surface of the notch 65 opposite to the self-locking block 8 is inclined.

[0051] In order to provide a sufficiently large elastic force so that the self-locking block 8 always has a tendency to rotate toward the locking member 6, the second elastic member 9 in this embodiment includes a torsion spring 91 and a second spring 92. The torsion spring 91 is sleeved on the pin 81, and the second spring 92 abuts between the self-locking block 8 and the upper handle 21. The torsion spring 91 and the second spring 92 work together to drive the self-locking block 8 to rotate. Of course, the torsion spring 91 or the second spring 92 can also be used alone, as long as there is enough force to drive the self-locking block 8 to rotate.

[0052] When there is no pressure in the pot and the pot cover 2 needs to be opened, the body 321 of the valve cap 32 is opposite to the opening 62 at the front of the locking member 6, so that the user can push the locking member 6 forward. When the locking member 6 moves forward, the stop block 61 on the bottom of the locking member 6 is separated from the stop groove 50 between the two protrusions 5, and the pot cover 2 can be rotated counterclockwise to open the lid. After the pot cover 2 is rotated, the step 82 on the self-locking block 8 is separated from the protrusion 5, and the self-locking block 8 rotates clockwise in the direction of the locking member 6 under the action of the second elastic member 9 and abuts against the notch 65 of the locking member 6, thereby preventing the locking member 6 from moving backward.

[0053] When there is pressure in the pot, the flange 322 on the valve cap 32 faces the opening 62 at the front of the locking member 6, so that the locking member 6 cannot move forward and the user cannot open the lid.

[0054] When the lid needs to be closed, the pot cover 2 is rotated clockwise so that the upper handle 21 on the pot cover 2 is opposite to the lower handle 11 on the pot body 1. During the clockwise rotation of the pot cover 2, the step 82 on the self-locking block 8 will contact the protrusion 5 and, under the action of the protrusion 5, overcome the action of the second elastic member 9 and rotate counterclockwise to leave the notch 65 on the locking member 6. At the same time, the locking member 6 can move backward under the action of the first elastic member so that the limiting block 61 on the bottom of the locking member 6 enters the limiting groove 50 between the two protrusions 5, completing the lid closing.

[0055] If an error occurs during the closing process so that the bottom of the locking member 6 cannot move backwards to between the two protrusions 5, the front opening 62 of the locking member 6 will still be located on the valve cap 32, making the valve cap 32 unable to work normally, thereby preventing the pressure cooker from working when the lid is not completely closed, thereby improving the safety of use.

Claims

1. A pressure cooker comprising: A pot body (1) having a lower handle (11) disposed thereon; A pot cover (2) is arranged on the pot body (1) and is screwed together with the pot body (1), and the pot cover (2) is provided with an upper handle (21) matching with the lower handle (11); It is characterized by also including: At least two protrusions (5) are arranged on the top surface of the lower handle (11) at intervals on the left and right, and a limiting groove (50) is formed between the protrusions (5) arranged at intervals on the left and right; A locking member (6) is arranged on the upper handle (21) so as to be movable forward and backward. A limiting block (61) is arranged on the bottom of the locking member (6) and matches the limiting groove (50). The limiting block (61) is disengaged from the limiting groove (50) after the locking member (6) moves forward, thereby loosening the pot cover (2) and realizing opening the cover; at least a part of the locking member (6) is exposed outside the upper handle (21) and can move forward and backward relative to the upper handle (21); a first elastic member acting on the locking member (6) so that the locking member (6) always has a tendency to move backwards; A self-locking block (8) is arranged on the upper handle (21) so as to be rotatable left and right and is located on the left or right side of the locking member (6). When the pot cover (2) is screwed on to close the lid, the self-locking block (8) abuts against the protrusion (5) and rotates away from the locking member (6) under the action of the protrusion (5), so that the locking member (6) can move backwards. When the pot cover (2) is unscrewed to open the lid, the self-locking block (8) is separated from the protrusion (5) and rotates in the direction of the locking member (6) to abut against the locking member (6), thereby preventing the locking member (6) from moving backwards. A second elastic member (9) acts on the self-locking block (8) so that the self-locking block (8) always has a tendency to rotate in the direction where the locking member (6) is located; The invention also comprises a float safety valve (3) arranged on the pot cover (2), wherein the valve cap (32) of the float safety valve (3) passes through the pot cover (2) and can move up and down relative to the pot cover (2); the front part of the locking member (6) cooperates with the valve cap (32) of the float safety valve (3), so that the valve cap (32) of the float safety valve (3) can block the locking member (6) from moving forward after moving upward; The front portion of the locking member (6) has an opening (62); the valve cap (32) of the float safety valve (3) comprises a body (321) and a flange (322) protruding from the lower portion of the body; the outer diameter of the body (321) is smaller than the diameter of the opening (62); the outer diameter of the flange (322) is larger than the diameter of the opening (62); the flange (322) is located in front of the opening (62) after the valve cap (32) of the float safety valve (3) moves upward; and the body (321) is located in front of the opening (62) after the valve cap (32) of the float safety valve (3) falls down; The first elastic member comprises a first spring (7), and two ends of the first spring (7) are respectively abutted between the pot cover (2) and the locking member (6).

2. The pressure cooker according to claim 1, characterized in that: The top of the self-locking block (8) is rotatably connected to the upper handle (21) via a pin shaft (81), and the bottom is provided with a step (82) that cooperates with the protrusion (5). The side of the locking member (6) opposite to the self-locking block (8) is provided with a notch (65) for the self-locking block (8) to be locked in after rotation.

3. The pressure cooker according to claim 2, characterized in that: The wall surface of the notch (65) opposite to the self-locking block (8) is arranged inclined.

4. The pressure cooker according to claim 2, characterized in that: The second elastic member (9) comprises a torsion spring (91) and / or a second spring (92); the torsion spring (91) is sleeved on the pin shaft (81); and the second spring (92) abuts between the self-locking block (8) and the upper handle (21).

5. The pressure cooker according to claim 2, characterized in that: The self-locking block (8) is located on the right side of the locking member (6), and the step (82) on the bottom of the self-locking block (8) can abut against the right side wall of the protrusion (5) located on the right side.

6. The pressure cooker according to claim 1, characterized in that: The invention also comprises a sealing ring (22) installed in the pot cover (2); a guide column (64) is protruding from the locking member (6); the first spring (7) is sleeved on the guide column (64); and a through hole (20) is opened on the pot cover (2) for the end of the guide column (64) to pass through; the through hole (20) is opposite to the sealing ring (22); and the hole diameter of the through hole (20) is smaller than the outer diameter of the first spring (7).

7. The pressure cooker according to claim 6, characterized in that: The guide column (64) is a conical structure, and the end portion of the guide column (64) is a small head end of the conical structure.

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