Foldable portable electric kettle
By adopting a foldable curved cavity and chute structure and automatic cleaning function in the electric kettle, the inconvenience and cleaning problems of traditional electric kettle are solved, and a portable and hygienic and safe electric kettle is achieved.
Patent Information
- Application Number
- CN202411437782.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-01-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional electric kettles are fixed in size, difficult to carry, difficult to store, and lack effective cleaning mechanisms, resulting in accumulation of scale and bacterial breeding health risks.
A foldable electric kettle is designed, with a curved cavity and chute structure for portability, and an automatic cleaning function is integrated into the heating base, using a motor-driven cleaning ring and brush to remove scale and stains.
It achieves a huge reduction in space occupation, which is easy to carry and store, while ensuring the inner wall of the pot body is clean and hygienic, extending its service life, and avoiding bacterial growth and odor generation.
Smart Images
Figure CN119302539A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to electric kettle technology, in particular to a foldable portable electric kettle. Background Art
[0002] In the context of modern fast-paced life and frequent travel, people's demand for portable daily necessities is growing. As a common daily necessity, the traditional style of electric kettles has many inconveniences. The traditional electric kettle has a fixed size, which is extremely inconvenient to carry during business trips or outdoor activities, and takes up a lot of luggage space. In terms of storage, due to its non-deformable structural characteristics, it is difficult to adapt to various storage environments. In addition, traditional electric kettles lack an effective cleaning mechanism. After long-term use, scale and stains are easily accumulated on the inner wall of the kettle, which not only affects the heating efficiency, but also may breed bacteria and endanger health. Manual cleaning methods are often time-consuming and labor-intensive, and it is difficult to thoroughly clean some dead corners inside the kettle;
[0003] To solve these problems, a foldable electric kettle with an automatic cleaning function and a stable and safe structure has become the direction of market demand, so a foldable electric kettle is needed. Summary of the invention
[0004] Purpose of the invention: The purpose of the present invention is to provide a foldable function for the kettle body, reduce the occupied space, and facilitate users to carry and store in various scenarios; another purpose of the present invention is to provide an electric kettle with a cleaning function and can ensure safe and hygienic use.
[0005] Technical solution: A foldable portable electric kettle, comprising a kettle body, a slide groove is provided inside the kettle body, an arc cavity is snap-connected inside the kettle body, an arc plate is fixedly connected to the outer wall of the arc cavity, and the arc plate is slidably connected to the slide groove;
[0006] A circle of telescopic cavity is opened on the lower surface of the arc cavity, and a sliding wedge plate is slidably connected to the inside of the telescopic cavity. The lower surface of the sliding wedge plate is fixedly connected to an arc-shaped vertical plate, and the bottom end of the arc-shaped vertical plate is fixedly connected to the inner lower surface of the kettle body. The lower surface of the kettle body is symmetrically provided with power-on ports, and a heating base is provided on the lower surface of the kettle body, and a power-on block is symmetrically fixedly connected to the upper surface of the heating base.
[0007] Furthermore, a locking right opening is provided on the right side of the inner upper surface of the slide slot, and a locking groove is provided on the left side of the inner upper surface of the locking right opening, a double-sided wedge block is slidably connected inside the locking groove, a spring 1 is fixedly connected between the left side of the double-sided wedge block and the left side of the inner slot, a locking left opening is provided on the right side of the inner upper surface of the slide slot, an elastic groove is provided on the right side of the inner left opening of the left opening, an arc-shaped slide block is slidably connected inside the elastic groove, a locking wedge block is fixedly connected to the left side of the arc-shaped slide block, the left end of the locking wedge block penetrates into the interior of the locking left opening, and a plurality of springs 2 are fixedly connected between the right side of the arc-shaped slide block and the inner right side of the elastic groove, an extrusion hole is provided on the left side of the pot body, a sliding rod is slidably connected inside the extrusion hole, the right end of the sliding rod penetrates into the interior of the elastic groove and is fixedly connected to the left side of the arc-shaped slide block, an extrusion block is fixedly connected to the left side of the sliding rod, and the upper surface of the arc plate is symmetrically fixedly connected with vertical blocks inside the slide slot, and the opposite ends of the vertical blocks are fixedly connected with locking wedge blocks.
[0008] Furthermore, the heating base includes a circular cavity, a rotating groove is provided inside the circular cavity, a rotating opening is provided on the inner upper surface of the rotating groove, a rotating column is rotatably connected inside the rotating opening, a rotating disk is fixedly connected to the lower surface of the rotating column, a circle of racks is symmetrically fixedly connected to the lower surface of the rotating disk, a sliding opening is provided on the outer wall of the circular cavity, a cross plate is fixedly connected to the left side of the rotating disk, a cleaning ring is provided on the outer wall of the circular cavity, the inner wall of the cleaning ring is fixedly connected to the left side of the cross plate, a motor is fixedly connected to the inner right side of the rotating groove, a transverse rod is fixedly connected to the left end of the output end of the motor, the left end of the transverse rod is rotatably connected to the inner side of the rotating groove, an upper half rotating tooth is fixedly connected to the outer wall of the transverse rod, and a lower half rotating tooth is fixedly connected to the outer wall of the transverse rod located on the right side of the upper half rotating tooth.
[0009] Furthermore, a limited semicircular groove is provided on the lower surface of the heating base, a heating layer is fixedly connected to the inner lower surface of the kettle body, and a limited semicircular block is fixedly connected to the upper surface of the heating layer.
[0010] Furthermore, a vertical column is fixedly connected to the left side of the upper surface of the kettle body, an upper cover is rotatably connected to the outer wall of the vertical column, a magnet is fixedly connected to the right side of the lower surface of the upper cover, and an iron block is fixedly connected to the right side of the upper surface of the kettle body.
[0011] Furthermore, a handle is fixedly connected to the outer side wall of the kettle body.
[0012] Furthermore, a control switch is symmetrically fixedly connected to the upper surface of the heating base.
[0013] Furthermore, the interior of the slide groove is symmetrically provided with limiting grooves, the outer side wall of the arc-shaped plate is symmetrically fixedly connected with limiting blocks, and the limiting blocks are slidably connected with the adjacent limiting grooves.
[0014] Beneficial effects: The arc cavity is folded and stored by sliding the arc plate in the slide groove, which greatly reduces the space occupied by the electric kettle when it is idle. Whether it is traveling, on a business trip or for home storage, it can be easily placed. The cooperation between the sliding wedge plate and the telescopic cavity, as well as the limit block and the limit groove, ensures the smoothness and stability of the folding and unfolding process of the arc cavity. When unfolded, the arc cavity can quickly form a reliable water container, which is easy to use. Moreover, in the stored state, the overall structure of the kettle body is compact, not easily damaged by external forces, and is easy to carry and transport, which provides great convenience for users to use the electric kettle in different scenarios. When the arc cavity is unfolded, the cooperation of the locking wedge block and the snap-fit structure can effectively lock the position of the arc cavity to prevent dangerous situations such as hot water spilling due to accidental sliding during water filling or heating;
[0015] During the folding and storage process, the various components work closely together and move along a predetermined trajectory, reducing the risk of wear and damage caused by loose components or friction. During long-term use, the stable folding structure helps to extend the service life of the electric kettle and ensure the safety of users; the automatic cleaning function of the heating base solves the cleaning problem for users. The motor drives the horizontal rotating rod to rotate, driving the turntable to rotate intermittently, so that the cleaning circle moves and cleans the inner wall of the kettle body. The brush on the outside of the cleaning circle increases the cleaning area and strength, and can effectively remove scale, stains, etc. Whether it is a simple cleaning after daily use or a deep cleaning after long-term use, it can ensure that the inner wall of the kettle body is clean and tidy to avoid bacterial growth and odor. Ensure that the water quality is clean and hygienic every time you boil water, providing protection for the health of users. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0017] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;
[0018] Figure 3 The present invention Figure 2 A schematic diagram of the enlarged structure at point A;
[0019] Figure 4 The present invention Figure 2 A schematic diagram of the enlarged structure at B;
[0020] Figure 5 It is a schematic cross-sectional structural diagram of the heating base of the present invention.
[0021] In the figure: 1, kettle body; 2, slide groove; 3, arc cavity; 4, arc plate; 5, telescopic cavity; 6, sliding wedge plate; 7, arc vertical plate; 8, power port; 9, heating base; 10, power block; 11, right-side clamping port; 12, clamping groove; 13, double-sided wedge block; 14, spring 1; 15, left-side clamping port; 16, spring groove; 17, arc slide plate; 18, clamping wedge block; 19, spring 2; 20, extrusion hole; 21, sliding rod; 22, extrusion block; 23, locking wedge block; 24, limiting semicircular groove; 2 5. Limiting semicircular block; 26. Vertical column; 27. Upper cover; 28. Magnet; 29. Iron block; 30. Handle; 31. Control switch; 32. Heating layer; 33. Vertical block; 34. Limiting groove; 35. Limiting block; 101. Round cavity; 102. Rotating groove; 103. Rotating mouth; 104. Rotating column; 105. Turntable; 106. Cross plate; 107. Slide; 108. Motor; 109. Cross-rotating rod; 110. Upper half rotating gear; 111. Lower half rotating gear; 112. Rack; 113. Cleaning circle. DETAILED DESCRIPTION
[0022] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0023] Example 1
[0024] like Figure 1 and Figure 2 As shown, a foldable portable electric water kettle is provided, comprising a kettle body 1, a slide groove 2 is provided inside the kettle body 1, an arc cavity 3 is connected to the kettle body 1, an outer wall of the arc cavity 3 is fixedly connected to an arc plate 4, the arc plate 4 is slidably connected to the slide groove 2, a circle of telescopic cavity 5 is provided on the lower surface of the arc cavity 3, a sliding wedge plate 6 is slidably connected to the inside of the telescopic cavity 5, an arc vertical plate 7 is fixedly connected to the lower surface of the sliding wedge plate 6, the bottom end of the arc vertical plate 7 is fixedly connected to the lower surface of the kettle body 1, a power-on port 8 is symmetrically provided on the lower surface of the kettle body 1, a heating base 9 is provided on the lower surface of the kettle body 1, and a power-on block 10 is symmetrically fixedly connected to the upper surface of the heating base 9;
[0025] When preparing for use, the user applies external force to the kettle body 1 or the arc-shaped cavity 3. Because the arc plate 4 of the arc-shaped cavity 3 is slidably connected to the slide groove 2 inside the kettle body 1, under the action of external force, the arc-shaped cavity 3 will slide upward along the slide groove 2. At this time, the arc-shaped cavity 3 gradually extends outward from the inside of the kettle body 1. In the process of the arc-shaped cavity 3 moving upward, the sliding wedge plate 6 connected thereto slides in the telescopic cavity 5. The arc-shaped vertical plate 7 on the lower surface of the sliding wedge plate 6 is fixed to the lower surface of the kettle body 1 at its bottom end, so it can play a supporting and guiding role, ensuring that the arc-shaped cavity 3 is smoothly unfolded until it is fully unfolded to form a space that can be filled with water. The kettle body 1 is placed on the heating base 9 to ensure that the kettle body The power-on port 8 on the lower surface of the kettle body 1 is accurately connected with the power-on block 10 on the upper surface of the heating base 9. After power is turned on, the current forms a loop through the power-on block 10 and the power-on port 8 to supply power to the heating element of the electric kettle. The electrical energy is converted into thermal energy, and the heat is transferred from the bottom of the kettle body 1 to gradually heat up the water in the kettle body 1 until the required temperature is reached. During the heating process, the arc cavity 3, the arc plate 4 and other components work together to maintain the stability of the internal structure of the kettle body 1. After use, an external force is applied to make the arc cavity 3 slide downward along the slide groove 2, and the sliding wedge plate 6 slides in the opposite direction in the telescopic cavity 5, and the arc cavity 3 is gradually stored back into the kettle body 1, reducing the occupied space and facilitating carrying and storage.
[0026] like Figure 3 and Figure 4 As shown, a right-engaging opening 11 is provided on the right side of the inner upper surface of the slide 2, a slot 12 is provided on the left side of the inner upper surface of the right-engaging opening 11, a double-sided wedge 13 is slidably connected to the inside of the slot 12, a spring 14 is fixedly connected between the left side of the double-sided wedge 13 and the left side of the inner part of the slot 12, a left-engaging opening 15 is provided on the right side of the inner upper surface of the slide 2, an elastic slot 16 is provided on the right side of the inner part of the left-engaging opening 15, an arc-shaped slide 17 is slidably connected to the inner part of the elastic slot 16, a locking wedge 18 is fixedly connected to the left side of the arc-shaped slide 17, and the left end of the locking wedge 18 is fixedly connected to the left side of the locking wedge The arc plate 4 is provided with a plurality of springs 19, which are fixedly connected between the right side of the arc-shaped slide plate 17 and the right side of the inner side of the spring groove 16. The left side of the kettle body 1 is provided with an extrusion hole 20, and a sliding rod 21 is slidably connected to the inner side of the extrusion hole 20. The right end of the sliding rod 21 is provided with the inner side of the spring groove 16 and is fixedly connected to the left side of the arc-shaped slide plate 17. The left side of the sliding rod 21 is fixedly connected with an extrusion block 22. The upper surface of the arc plate 4 is symmetrically fixedly connected with vertical blocks 33 located inside the slide groove 2. The opposite ends of the vertical blocks 33 are fixedly connected with locking wedges 23.
[0027] When the arc cavity 3 is being unfolded or stored, the vertical block 33 and the locking wedge 23 on the arc plate 4 will move with the arc plate 4 in the slide groove 2. When the arc cavity 3 is in a specific position, the locking wedge 23 may enter the right engagement opening 11 or the left engagement opening 15, and interact with the double-sided wedge 13 or the engagement wedge 18 to lock the position of the arc cavity 3. To release the lock, the squeeze block 22 can be pressed to make the sliding rod 21 push the arc slide plate 17 to slide in the elastic groove 16, thereby driving the engagement wedge 18 to move, releasing the engagement of the locking wedge 23, and further enhancing the locking and unlocking functions.
[0028] like Figure 5 As shown, the heating base 9 includes a circular cavity 101, a rotating groove 102 is provided inside the circular cavity 101, a rotating opening 103 is provided on the inner upper surface of the rotating groove 102, a rotating column 104 is rotatably connected inside the rotating opening 103, a rotating disk 105 is fixedly connected to the lower surface of the rotating column 104, a circle of racks 112 are symmetrically fixedly connected to the lower surface of the rotating disk 105, a sliding opening 107 is provided on the outer side wall of the circular cavity 101, a horizontal plate 106 is fixedly connected to the left side of the rotating disk 105, and the outer side wall of the circular cavity 101 A cleaning circle 113 is provided, the inner side wall of the cleaning circle 113 is fixedly connected to the left side of the horizontal plate 106, a motor 108 is fixedly connected to the right side of the inner side of the rotating groove 102, a traverse rod 109 is fixedly connected to the left end of the output end of the motor 108, the left end of the traverse rod 109 is rotatably connected to the inner side of the rotating groove 102, an upper half rotating tooth 110 is fixedly connected to the outer side wall of the traverse rod 109, and a lower half rotating tooth 111 is fixedly connected to the outer side wall of the traverse rod 109, located on the right side of the upper half rotating tooth 110;
[0029] When the motor 108 is started, its output end drives the transverse rod 109 to rotate, and the upper half rotating teeth 110 and the lower half rotating teeth 111 on the transverse rod 109 rotate with the transverse rod 109. When the transverse rod 109 rotates, the upper half rotating teeth 110 and the lower half rotating teeth 111 will intermittently engage with the rack 112 on the lower surface of the turntable 105, thereby driving the turntable 105 to rotate intermittently. When the turntable 105 rotates, the rotating column 104 rotates in the turntable 103 to achieve reciprocating stable rotation. At the same time, the turntable 105 drives the cross plate 106 to move, and the cross plate 106 drives the cleaning circle 113 to move. The cleaning circle 113 is used to clean the inner wall of the kettle body 1. The automatic cleaning function is realized by the drive of the motor 108 to ensure the cleanliness and normal operation of the interior of the kettle body 1. At the same time, a brush is arranged on the outside of the cleaning circle 113 to increase the cleaning range and improve the cleaning intensity.
[0030] like Figure 1 and Figure 5 As shown, a limited semicircular groove 24 is provided on the lower surface of the heating base 9, a heating layer 32 is fixedly connected to the inner lower surface of the kettle body 1, and a limited semicircular block 25 is fixedly connected to the upper surface of the heating layer 32;
[0031] When the heating base 9 is placed inside the kettle body 1, the limiting semicircular block 25 cooperates with the limiting semicircular groove 24 to position and fix the relative position of the kettle body 1 and the heating base 9. This design ensures that the heating base 9 will not slip when rotating during cleaning.
[0032] like Figure 1 As shown, a vertical column 26 is fixedly connected to the left side of the upper surface of the kettle body 1, an upper cover 27 is rotatably connected to the outer wall of the vertical column 26, a magnet 28 is fixedly connected to the right side of the lower surface of the upper cover 27, and an iron block 29 is fixedly connected to the right side of the upper surface of the kettle body 1;
[0033] The vertical column 26 supports the upper cover 27 and enables it to rotate around the vertical column 26, which makes it easy to open and close the upper cover 27. When the upper cover 27 is closed, the magnet 28 and the iron block 29 attract each other and fix the upper cover 27 to prevent the upper cover 27 from being accidentally opened when carrying. At the same time, when using the electric kettle, it is ensured that the water in the kettle will not overflow due to the loose upper cover 27, reducing the entry of dust and other impurities into the kettle, thereby ensuring the cleanliness of the water.
[0034] like Figure 1 As shown, a handle 30 is fixedly connected to the outer wall of the kettle body 1;
[0035] The main function of the handle 30 is to facilitate the user to take and move the electric kettle. It provides a comfortable gripping position for the user, making it more convenient and safer during operations such as carrying and pouring water.
[0036] like Figure 1 and Figure 5 As shown, a control switch 31 is symmetrically fixedly connected to the upper surface of the heating base 9;
[0037] The control switch 31 is mainly used to control the heating function of the electric kettle. The control switch 31 is used to turn on or off the power of the motor 108. When the power switch is pressed, the motor 108 can rotate to clean the inside of the kettle body 1.
[0038] like Figure 2 As shown, the inner part of the slide groove 2 is symmetrically provided with a limiting groove 34, and the outer side wall of the arc-shaped plate 4 is symmetrically fixedly connected with a limiting block 35, and the limiting block 35 is slidably connected with the adjacent limiting groove 34;
[0039] The cooperation between the limit groove 34 and the limit block 35 serves to limit the moving direction and range of the arc plate 4 in the slide groove 2. When the arc cavity 3 is unfolded or stored, the arc plate 4 slides along the slide groove 2, and the limit block 35 slides in the limit groove 34, ensuring that the arc plate 4 can only move smoothly in a specific direction without deviation or shaking.
[0040] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.
Claims
1. A foldable portable electric kettle, comprising a kettle body (1), characterized in that: A slide groove (2) is provided inside the kettle body (1), an arc-shaped cavity (3) is snap-connected inside the kettle body (1), an arc-shaped plate (4) is fixedly connected to the outer wall of the arc-shaped cavity (3), and the arc-shaped plate (4) is slidably connected to the slide groove (2); The lower surface of the arc-shaped cavity (3) is provided with a circle of telescopic cavity (5), the interior of the telescopic cavity (5) is slidably connected with a sliding wedge plate (6), the lower surface of the sliding wedge plate (6) is fixedly connected with an arc-shaped vertical plate (7), the bottom end of the arc-shaped vertical plate (7) is fixedly connected to the inner lower surface of the kettle body (1), the lower surface of the kettle body (1) is symmetrically provided with power supply ports (8), the lower surface of the kettle body (1) is provided with a heating base (9), and the upper surface of the heating base (9) is symmetrically fixedly connected with a power supply block (10).
2. A foldable portable electric kettle according to claim 1, characterized in that: A right engaging opening (11) is provided on the right side of the inner upper surface of the slide groove (2), a slot (12) is provided on the left side of the inner upper surface of the right engaging opening (11), a double-sided wedge (13) is slidably connected to the interior of the slot (12), a spring (14) is fixedly connected between the left side of the double-sided wedge (13) and the left side of the inner side of the slot (12), a left engaging opening (15) is provided on the right side of the inner upper surface of the slide groove (2), an elastic groove (16) is provided on the right side of the inner side of the left engaging opening (15), an arc-shaped slide plate (17) is slidably connected to the interior of the elastic groove (16), a locking wedge (18) is fixedly connected to the left side of the arc-shaped slide plate (17), and the left end of the locking wedge (18) is penetrated by a spring. The arc-shaped slide plate (17) is inserted into the inside of the left engaging opening (15); a plurality of springs (19) are fixedly connected between the right side of the arc-shaped slide plate (17) and the right side of the inside of the elastic groove (16); an extrusion hole (20) is opened on the left side of the kettle body (1); a sliding rod (21) is slidably connected to the inside of the extrusion hole (20); the right end of the sliding rod (21) passes through the inside of the elastic groove (16) and is fixedly connected to the left side of the arc-shaped slide plate (17); an extrusion block (22) is fixedly connected to the left side of the sliding rod (21); the upper surface of the arc-shaped plate (4) is symmetrically fixedly connected to a vertical block (33) located inside the slide groove (2); the opposite ends of the vertical block (33) are fixedly connected to a locking wedge block (23).
3. A foldable portable electric kettle according to claim 1, characterized in that: The heating base (9) comprises a circular cavity (101), a rotating groove (102) is provided inside the circular cavity (101), a rotating opening (103) is provided on the inner upper surface of the rotating groove (102), a rotating column (104) is rotatably connected inside the rotating opening (103), a rotating disk (105) is fixedly connected to the lower surface of the rotating column (104), a circle of racks (112) is symmetrically fixedly connected to the lower surface of the rotating disk (105), a sliding opening (107) is provided on the outer side wall of the circular cavity (101), a horizontal plate (106) is fixedly connected to the left side of the rotating disk (105), and the outer wall of the circular cavity (101) is provided with a rotating groove (102). A cleaning ring (113) is provided on the side wall, the inner wall of the cleaning ring (113) is fixedly connected to the left side of the horizontal plate (106), the inner right side of the rotating groove (102) is fixedly connected to a motor (108), the left end of the output end of the motor (108) is fixedly connected to a traverse rod (109), the left end of the traverse rod (109) is rotatably connected to the inner side of the rotating groove (102), the outer wall of the traverse rod (109) is fixedly connected to an upper half rotating tooth (110), and the outer wall of the traverse rod (109) is fixedly connected to a lower half rotating tooth (111) located on the right side of the upper half rotating tooth (110).
4. A foldable portable electric kettle according to claim 1, characterized in that: A limited semicircular groove (24) is provided on the lower surface of the heating base (9), a heating layer (32) is fixedly connected to the inner lower surface of the kettle body (1), and a limited semicircular block (25) is fixedly connected to the upper surface of the heating layer (32).
5. A foldable portable electric kettle according to claim 1, characterized in that: A vertical column (26) is fixedly connected to the left side of the upper surface of the kettle body (1); an upper cover (27) is rotatably connected to the outer wall of the vertical column (26); a magnet (28) is fixedly connected to the right side of the lower surface of the upper cover (27); and an iron block (29) is fixedly connected to the right side of the upper surface of the kettle body (1).
6. A foldable portable electric kettle according to claim 1, characterized in that: A handle (30) is fixedly connected to the outer side wall of the kettle body (1).
7. A foldable portable electric kettle according to claim 1, characterized in that: A control switch (31) is symmetrically fixedly connected to the upper surface of the heating base (9).
8. A foldable portable electric kettle according to claim 1, characterized in that: The interior of the slide groove (2) is symmetrically provided with a limiting groove (34), the outer side wall of the arc-shaped plate (4) is symmetrically fixedly connected with a limiting block (35), and the limiting block (35) is slidably connected to the adjacent limiting groove (34).