WO2024036733A1

WO2024036733A1 - Cigarette extraction mechanism for heat-not-burn smoking device, and heat-not-burn smoking device

Info

Publication number: WO2024036733A1
Application number: PCT/CN2022/125310
Authority: WO
Inventors: 陈杰; 赵贯云; 赵波洋; 廖振龙; 陈跃勇
Original assignee: 深圳市吉迩科技有限公司
Priority date: 2022-08-18
Filing date: 2022-10-14
Publication date: 2024-02-22
Also published as: CN115336792A

Abstract

A cigarette extraction mechanism for a heat-not-burn smoking device, and a heat-not-burn smoking device. The cigarette extraction mechanism for a heat-not-burn smoking device comprises: a cigarette holder (1), pressing assemblies (2), and a support (3). The pressing assemblies (2) is provided on the cigarette holder (1) and can move in the radial direction of the cigarette holder (1); the support (3) is provided with guide slots (4); and each pressing assembly (2) comprises a driving column (5) matching the guide slots (4). When a cigarette is inserted into the cigarette holder (1), the driving columns (5) slide inside the guide slots (4) to drive the pressing assemblies (2) to move radially inward of the cigarette holder (1) so as to extend into the cigarette holder (1) to fix the cigarette; and when the cigarette is pulled out, the pressing assemblies (2) are driven to move upward, and the driving columns (5) slide inside the guide slots (4) to drive the pressing assemblies (2) to move radially outward of the cigarette holder (1), so as to separate the pressing assemblies (2) from the cigarette. Technical solution can solve the problem in the prior art that tobacco is prone to adhesion to a heating element .

Description

Cigarette extraction mechanism for heat-not-burn smoking set and heat-not-burn smoking set

Technical field

The invention belongs to the technical field of smoking set manufacturing, and specifically relates to a cigarette extraction mechanism of a heat-not-burn smoking set and a heat-not-burn smoking set.

Background technique

When using heat-not-burn smoking devices currently on the market, after the cigarette is heated, the tobacco easily adheres to the heating element, so that when the cigarette is pulled out directly, the cigarette paper outside comes out, but the tobacco inside remains in the heating element. On the body, it is necessary to open the lid of the smoking device and clean it before continuing to use the next cigarette.

Contents of the invention

Therefore, the present invention provides a cigarette extraction mechanism for a heat-not-burn smoking device and a heat-not-burn smoking device, which can overcome the problem in the prior art that tobacco easily adheres to the heating element.

In order to solve the above problems, the present invention provides a cigarette extraction mechanism for a heat-not-burn smoking device, which includes:

The cigarette holder, the pressing component and the bracket. The pressing component is arranged on the cigarette holder and can move in the radial direction of the cigarette holder. The bracket is provided with a guide groove. The pressing component includes a driving column that matches the guide groove. When a cigarette is inserted into the cigarette holder, the driving column slides in the guide groove to drive the pressing component to move radially inward of the cigarette holder to extend into the cigarette holder to fix the cigarette. When the cigarette is pulled out, the pressing component is driven upward. Move, the driving column slides in the guide groove to drive the pressing component to move radially outward of the cigarette holder, so that the pressing component is separated from the cigarette.

In some embodiments,

The pressing assembly also includes an ejector pin. The cigarette holder is provided with a first through hole. The ejector pin is arranged in the first through hole. The head of the ejector pin faces the radial inner side of the cigarette holder. The driving column is provided with the tail of the ejector pin. The axial end of the driving column The part is slidably inserted into the guide groove.

In some embodiments,

A mounting portion is provided on the outside of the cigarette holder, and a chute is disposed on the mounting portion. The chute is disposed relative to the first through hole and extends radially outward of the cigarette holder, and the driving column is disposed in the chute.

In some embodiments,

The driving column and the ejector pin are arranged vertically.

In some embodiments,

The guide groove is provided on the inner wall of the bracket; or the guide groove penetrates the bracket in the radial direction.

In some embodiments,

The guide groove includes a guide section, which is a spiral groove provided on the bracket. When a cigarette is inserted into the cigarette holder, the driving column moves in the guide section from the end facing the cigarette holder to the end away from the cigarette holder. When the cigarette is pulled out When, the driving column moves from the end away from the cigarette holder to the end toward the cigarette holder in the guide section.

In some embodiments,

The guide groove also includes a first transition section. The first transition section is opened in the axial direction of the bracket. The first end of the first transition section extends to the end of the bracket facing the cigarette holder. The second end of the first transition section is connected to the end of the bracket. The guide section is connected to one end facing the cigarette holder; and/or the guide groove also includes a second transition section, the second transition section is opened in the axial direction of the bracket, and the end of the second transition section facing the cigarette holder is separated from the guide section away from the cigarette holder. connected at one end.

In some embodiments,

The driving column includes a first driving end and a second driving end at both axial ends. The bracket is provided with guide grooves at positions corresponding to the first driving end and the second driving end. The guide groove is provided corresponding to the first driving end. is a first guide groove, and the guide groove provided corresponding to the second driving end is a second guide groove, and the first guide groove and the second guide groove are symmetrically arranged.

The present invention also provides a heat-not-burn smoking device, which includes the cigarette extraction mechanism of the heat-not-burn smoking device.

In some embodiments,

The heat-not-burn smoking set includes a smoking set body. The smoking set body includes a top cover, a bracket and a shell arranged in sequence. The cigarette holder is set in the top cover. The end of the top cover away from the bracket is provided with a cigarette insertion hole. The shell is arranged in sequence from the end close to the bracket. There is a heating element, a PCT and a battery. The heating element extends partially into the bracket. The cigarette holder is also provided with a second through hole for the heating element to extend into.

In some embodiments, the heat-not-burn smoking device further includes a magnet.

The invention provides a cigarette extraction mechanism for a heat-not-burn smoking set and a heat-not-burn smoking set. The guide groove on the bracket limits the movement trajectory of the driving column of the pressing assembly, so that the pressing assembly can be driven in the radial direction of the cigarette holder. Move in the direction; specifically, when a cigarette is inserted into the cigarette holder, the driving column slides in the guide groove to drive the pressing assembly to move radially inward of the cigarette holder to extend into the cigarette holder to fix the cigarette. The pressing component can be inserted into the cigarette. When the cigarette is pulled out, the pressing component is driven to move upward. The driving column slides in the guide groove to drive the pressing component to move radially outward of the cigarette holder, so that the pressing component is in contact with the cigarette. Therefore, the present invention can overcome the problem in the prior art that tobacco easily adheres to the heating element.

Description of the drawings

Figure 1 is a schematic diagram of the exploded structure of a heat-not-burn smoking device according to an embodiment of the present invention;

Figure 2 is an axial cross-sectional view of the heat-not-burn smoking device according to the embodiment of the present invention;

Figure 3 is an axial cross-sectional view of the heat-not-burn smoking device in another direction according to the embodiment of the present invention;

Figure 4 is a schematic structural diagram of the cigarette holder of the heat-not-burn smoking device extraction mechanism according to the embodiment of the present invention;

Figure 5 is a schematic structural diagram of the cigarette holder of the heat-not-burn smoking device extraction mechanism according to the embodiment of the present invention;

Figure 6 is a schematic structural diagram of the cigarette holder of the heat-not-burn smoking device extraction mechanism according to the embodiment of the present invention;

Figure 7 is an axial cross-sectional view of the cigarette holder of the heat-not-burn smoking device extraction mechanism according to the embodiment of the present invention;

Figure 8 is a schematic structural diagram of the pressing assembly of the heat-not-burn smoking device extraction mechanism according to the embodiment of the present invention;

Figure 9 is a schematic structural diagram of the driving column of the heat-not-burn smoking device extraction mechanism according to the embodiment of the present invention;

Figure 10 is a schematic structural diagram of the ejector pin of the heat-not-burn smoking device extraction mechanism according to the embodiment of the present invention;

Figure 11 is a schematic diagram of the assembly structure of the cigarette holder, the pressing assembly and the bracket of the heat-not-burn smoking device extraction mechanism according to the embodiment of the present invention;

Figure 12 is a schematic structural diagram of the bracket of the heat-not-burn smoking device extraction mechanism according to the embodiment of the present invention;

Figure 13 is an axial cross-sectional view of the cigarette holder, the pressing assembly and the bracket of the heat-not-burn smoking device extraction mechanism after assembly according to the embodiment of the present invention;

Figure 14 is a schematic structural diagram of the cigarette holder, the pressing assembly and the bracket of the heat-not-burn smoking device extraction mechanism after assembly according to the embodiment of the present invention.

The reference symbols are expressed as:

1. Cigarette holder; 2. Pressing assembly; 3. Bracket; 4. Guide groove; 5. Driving column; 6. Ejector; 7. Installation part; 8. Slide; 9. Top cover; 10. Shell; 11. Heating element; 12. Battery; 13. PCT.

Detailed ways

Referring to FIGS. 1 to 14 , according to an embodiment of the present invention, a cigarette extraction mechanism for a heat-not-burn smoking device is provided, including:

Cigarette holder 1, pressing component 2 and bracket 3. The pressing component 2 is arranged on the cigarette holder 1 and can move in the radial direction of the cigarette holder 1. The bracket 3 is provided with a guide groove 4. The pressing component 2 includes The driving column 5 cooperates with the guide groove 4. When a cigarette is inserted into the cigarette holder 1, the driving column 5 slides in the guide groove 4 to drive the pressing assembly 2 to move radially inward of the cigarette holder 1 to extend into the cigarette holder 1. The cigarette is fixed inside. When the cigarette is pulled out, the pressing component 2 is driven to move upward. The driving column 5 slides in the guide groove 4 to drive the pressing component 2 to move radially outward of the cigarette holder 1, so that the pressing component 2 moves upward. 2. Separate from cigarettes. In this technical solution, the movement trajectory of the driving column 5 of the pressing assembly 2 is limited through the guide groove 4 on the bracket 3, so that the pressing assembly 2 can move in the radial direction of the cigarette holder 1; specifically, when the cigarette is When the cigarette holder 1 is inserted, the driving column 5 slides in the guide groove 4 to drive the pressing component 2 to move radially inward of the cigarette holder 1 to extend into the cigarette holder 1 to fix the cigarette. When in use, the pressing component 2 can Insert into the cigarette. When the cigarette is pulled out, the pressing component 2 is driven to move upward. The driving column 5 slides in the guide groove 4 to drive the pressing component 2 to move radially outward of the cigarette holder 1, so that the pressing component 2 moves upward. 2 is separated from the cigarette. Therefore, the present invention can overcome the problem in the prior art that tobacco easily adheres to the heating element.

In some embodiments,

The pressing assembly 2 also includes an ejection pin 6. A first through hole is provided on the cigarette holder 1. The ejection pin 6 is arranged in the first through hole. The head of the ejection pin 6 faces the radial inner side of the cigarette holder 1. The driving column 5 is provided with the ejection pin 6. At the tail end, the axial end of the driving column 5 is slidably inserted into the guide groove 4 . In this technical solution, the ejector pin 6 can drive the head of the ejector pin 6 into the cigarette holder 1 from the first through hole through the end of the driving column 5 in the guide groove 4 for fixation. Since the head of the ejector pin 6 is relatively sharp, , can be inserted into the inside of the cigarette, improving the fixing effect, and when the cigarette is pulled out, compared with the external fixing method, this solution is less likely to cause the tobacco to adhere to the heating element, improving the separation effect.

In some embodiments,

A mounting portion 7 is provided on the outside of the cigarette holder 1. A chute 8 is disposed on the mounting portion 7. The chute 8 is disposed opposite the first through hole and extends radially outward of the cigarette holder 1. The driving column 5 is disposed in the chute. Within 8. In this technical solution, a mounting part 7 is provided on the outside of the cigarette holder 1, and a chute 8 is provided on the mounting part 7. The chute 8 moves the ejector pin 6 and the driving column 5 in the radial direction of the cigarette holder 1. Guide, improve the accuracy of the movement of the pressing assembly 2 in the radial direction of the cigarette holder 1, and improve the supporting effect on the cigarette.

In some embodiments,

The driving column 5 and the ejector pin 6 are arranged vertically. In this technical solution, the driving column 5 and the ejector pin 6 are arranged vertically, so that the ejector pin 6 can move the maximum distance in the radial direction of the cigarette holder 1, reducing the time for supporting and separating cigarettes, and improving the extraction of cigarettes from the heat-not-burn smoking device. Organizational efficiency.

In some embodiments,

The guide groove 4 is provided on the inner wall of the bracket 3; or, the guide groove 4 penetrates the bracket 3 in the radial direction. In this technical solution, the guide groove 4 is provided on the inner wall of the bracket 3; or the guide groove 4 penetrates the bracket 3 in the radial direction, both of which can realize the technical solution of the present invention.

In some embodiments,

The guide groove 4 includes a guide section, which is a spiral groove provided on the bracket 3. When a cigarette is inserted into the cigarette holder 1, the driving column 5 moves in the guide section from the end facing the cigarette holder 1 to the end away from the cigarette holder 1. , when the cigarette is pulled out, the driving column 5 moves from the end away from the cigarette holder 1 to the end toward the cigarette holder 1 in the guide section. In this technical solution, the guide groove 4 includes a guide section, which is a spiral groove provided on the bracket 3. The end of the driving column 5 moves in the spiral groove to drive the thimble 6 to move in the radial direction of the cigarette holder 1. For the support and separation of cigarettes, specifically, when a cigarette is inserted into the cigarette holder 1, the driving column 5 moves from the end toward the cigarette holder 1 to the end away from the cigarette holder 1 in the guide section. When the cigarette is pulled out, The driving column 5 moves from the end away from the cigarette holder 1 to the end toward the cigarette holder 1 in the guide section.

In some embodiments,

The guide groove 4 also includes a first transition section. The first transition section is opened in the axial direction of the bracket 3. The first end of the first transition section extends to the end of the bracket 3 facing the cigarette holder 1. The first transition section The second end is connected to one end of the guide section facing the cigarette holder 1 . In this technical solution, one end of the guide section facing the cigarette holder 1 is provided with a first transition section connected thereto. The first transition section is opened in the axial direction of the bracket 3 and the first end of the first transition section extends to the bracket 3 The end facing one end of the cigarette holder 1 prevents the end of the driving column 5 from being separated from the guide groove 4 when taking out the cigarette, thereby improving the stability of the product.

and / or,

The guide groove 4 also includes a second transition section, which is opened in the axial direction of the bracket 3. The end of the second transition section facing the cigarette holder 1 is connected to the end of the guide section away from the cigarette holder 1. In this technical solution, a second transition section connected to the end of the guide section away from the cigarette holder 1 is provided. The second transition section is opened in the axial direction of the bracket 3 to prevent the end of the driving column 5 from being inwardly connected with the guide groove 4. The direction of the bracket 3 does not move in place, which affects the length of the heating element 11 inserted into the cigarette, thus ensuring the heating effect of the heating element 11 on the cigarette.

In some embodiments,

The driving column 5 includes a first driving end and a second driving end at both axial ends. The bracket 3 is provided with guide grooves 4 at positions corresponding to the first driving end and the second driving end, and is provided corresponding to the first driving end. The guide groove 4 is a first guide groove, the guide groove 4 corresponding to the second driving end is a second guide groove, and the first guide groove and the second guide groove are symmetrically arranged. In this technical solution, the first guide groove and the second guide groove are arranged symmetrically with respect to the plane formed by the radial movement direction of the pressing assembly 2 toward the cigarette holder 1 and the axis of the cigarette holder 1. Through the two axial directions of the driving column 5 The first driving end and the second driving end of the end slide in the two guide grooves 4, which improves the guiding effect and the stability of the product.

In some embodiments,

The heat-not-burn smoking set includes a smoking set body. The smoking set body includes a top cover 9, a bracket 3 and a shell 10 arranged in sequence. The cigarette holder 1 is set in the top cover 9. The end of the top cover 9 away from the bracket 3 is provided with a cigarette insertion hole. The shell 10 A heating element 11, a PCT 13 and a battery 12 are arranged in sequence from one end close to the bracket 3. The heating element 11 partially extends into the bracket 3. The cigarette holder 1 is also provided with a second through hole for the heating element 11 to partially extend into. Also includes magnets.

Those skilled in the art can easily understand that the advantageous technical features of the above methods can be freely combined and superimposed without conflict.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. Inside. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be considered. regarded as the protection scope of the present invention.

Claims

A cigarette extraction mechanism for a heat-not-burn smoking device, which includes:

Cigarette holder (1), pressing component (2) and bracket (3). The pressing component (2) is arranged on the cigarette holder (1) and can move in the radial direction of the cigarette holder (1). To move in the direction, the bracket (3) is provided with a guide groove (4), and the pressing assembly (2) includes a driving column (5) that matches the guide groove (4). When a cigarette is inserted into the When lifting the cigarette holder (1), the driving column (5) slides in the guide groove (4) to drive the pressing assembly (2) to move radially inward of the cigarette holder (1) to extend into the cigarette holder (1). The cigarette is fixed inside the cigarette holder (1). When the cigarette is pulled out, the pressing assembly (2) is driven to move upward, and the driving column (5) is in the guide groove (4). Slide to drive the pressing component (2) to move radially outward of the cigarette holder (1), so that the pressing component (2) is separated from the cigarette.
The cigarette extraction mechanism of the heat-not-burn smoking device according to claim 1, wherein,

The pressing assembly (2) also includes an ejector pin (6). A first through hole is provided on the cigarette holder (1), and the ejector pin (6) is arranged in the first through hole. The ejector pin (6) ) heads toward the radial inner side of the cigarette holder (1), the driving column (5) is provided with the tail of the thimble (6), and the axial end of the driving column (5) is slidably inserted in inside the guide groove (4).
The cigarette extraction mechanism of the heat-not-burn smoking device according to claim 2, wherein,

A mounting part (7) is provided on the outside of the cigarette holder (1), and a chute (8) is provided on the mounting part (7). The chute (8) is positioned opposite to the first through hole. Extending toward the radial outer side of the cigarette holder (1), the driving column (5) is arranged in the chute (8).
The cigarette extraction mechanism of the heat-not-burn smoking device according to claim 3, wherein,

The driving column (5) and the ejector pin (6) are arranged vertically.
The cigarette extraction mechanism of the heat-not-burn smoking device according to claim 1, wherein,

The guide groove (4) is provided on the inner wall of the bracket (3); or, the guide groove (4) penetrates the bracket (3) in the radial direction.
The cigarette extraction mechanism of the heat-not-burn smoking device according to claim 1, wherein,

The guide groove (4) includes a guide section, which is a spiral groove provided on the bracket (3). When a cigarette is inserted into the cigarette holder (1), the driving column (5) moves The guide section moves from the end toward the cigarette holder (1) to the end away from the cigarette holder (1). When the cigarette is pulled out, the driving column (5) moves in the guide section. The inside moves from the end away from the cigarette holder (1) to the end toward the cigarette holder (1).
The cigarette extraction mechanism of the heat-not-burn smoking device according to claim 6, wherein:

The guide groove (4) also includes a first transition section, which is opened in the axial direction of the bracket (3), and the first end of the first transition section extends to the bracket (3). 3) The end facing one end of the cigarette holder (1), the second end of the first transition section is connected to the end of the guide section facing the cigarette holder (1); and/or, the guide groove (1) 4) It also includes a second transition section. The second transition section is opened in the axial direction of the bracket (3). The second transition section faces one end of the cigarette holder (1) and the guide section. Connect the end away from the cigarette holder (1).
The cigarette extraction mechanism of the heat-not-burn smoking device according to claim 6, wherein:

The driving column (5) includes a first driving end and a second driving end at both axial ends, and the bracket (3) is provided with the first driving end and the second driving end at positions corresponding to the first driving end and the second driving end. Guide groove (4), the guide groove (4) provided corresponding to the first driving end is a first guide groove, and the guide groove (4) provided corresponding to the second driving end is a third guide groove (4). Two guide grooves, the first guide groove and the second guide groove are arranged symmetrically.
A heat-not-burn smoking device, which includes a cigarette extraction mechanism of the heat-not-burn smoking device;

The cigarette extraction mechanism of the heat-not-burn smoking device includes:

Cigarette holder (1), pressing component (2) and bracket (3). The pressing component (2) is arranged on the cigarette holder (1) and can move in the radial direction of the cigarette holder (1). To move in the direction, the bracket (3) is provided with a guide groove (4), and the pressing assembly (2) includes a driving column (5) that matches the guide groove (4). When a cigarette is inserted into the When lifting the cigarette holder (1), the driving column (5) slides in the guide groove (4) to drive the pressing assembly (2) to move radially inward of the cigarette holder (1) to extend into the cigarette holder (1). The cigarette is fixed inside the cigarette holder (1). When the cigarette is pulled out, the pressing assembly (2) is driven to move upward, and the driving column (5) is in the guide groove (4). Slide to drive the pressing component (2) to move radially outward of the cigarette holder (1), so that the pressing component (2) is separated from the cigarette.
The heat-not-burn smoking device according to claim 9, wherein,

It includes a smoking set body, which includes a top cover (9), the bracket (3) and the outer shell (10) arranged in sequence, the cigarette holder (1) is arranged in the top cover (9), the The end of the top cover (9) away from the bracket (3) is provided with a cigarette hole, and the housing (10) is provided with a heating element (11) and a PCT (13) in sequence from the end close to the bracket (3). As well as a battery (12), the heating element (11) partially extends into the bracket (3), and the cigarette holder (1) is also provided with a second hole for the heating element (11) to partially extend into. through hole.
The heat-not-burn smoking device according to claim 10, further comprising a magnet.
The heat-not-burn smoking device according to claim 9, wherein the pressing assembly (2) further includes an ejector pin (6), a first through hole is provided on the cigarette holder (1), and the ejector pin (6) is provided with In the first through hole, the head of the ejector pin (6) faces the radial inner side of the cigarette holder (1), and the driving column (5) is provided with the tail of the ejector pin (6). The axial end of (5) is slidably inserted into the guide groove (4).
The heat-not-burn smoking device according to claim 12, wherein a mounting part (7) is provided on the outside of the cigarette holder (1), and a chute (8) is provided on the mounting part (7). The groove (8) is opposite to the first through hole and extends radially outward of the cigarette holder (1), and the driving column (5) is arranged in the slide groove (8).
The heat-not-burn smoking device according to claim 13, wherein the driving column (5) and the ejector pin (6) are arranged vertically.
The heat-not-burn smoking device according to claim 9, wherein the guide groove (4) is provided on the inner wall of the bracket (3); or, the guide groove (4) penetrates all the parts in the radial direction. Described bracket (3).
The heat-not-burn smoking device according to claim 9, wherein the guide groove (4) includes a guide section, and the guide section is a spiral groove provided on the bracket (3). When a cigarette is inserted into the cigarette When holding the cigarette holder (1), the driving column (5) moves in the guide section from an end toward the cigarette holder (1) to an end away from the cigarette holder (1). When the cigarette is pulled out At this time, the driving column (5) moves within the guide section from an end away from the cigarette holder (1) to an end toward the cigarette holder (1).
The heat-not-burn smoking device according to claim 16, wherein the guide groove (4) further includes a first transition section, the first transition section is opened in the axial direction of the bracket (3), and the The first end of the first transition section extends to the end of the bracket (3) facing the cigarette holder (1), and the second end of the first transition section and the guide section face the cigarette holder (1). 1) One end is connected; and/or, the guide groove (4) also includes a second transition section, the second transition section is opened in the axial direction of the bracket (3), and the second transition section faces One end of the cigarette holder (1) is connected to an end of the guide section away from the cigarette holder (1).
The heat-not-burn smoking device according to claim 16, wherein the driving column (5) includes a first driving end and a second driving end at both axial ends, and the bracket (3) is connected to the first driving end. The guide groove (4) is provided at the corresponding position of the end and the second driving end. The guide groove (4) provided corresponding to the first driving end is a first guide groove, which is connected with the second driving end. The guide grooves (4) arranged corresponding to the ends are second guide grooves, and the first guide grooves and the second guide grooves are arranged symmetrically.
The heat-not-burn smoking set according to claim 12, which includes a smoking set body, the smoking set body includes a top cover (9), the bracket (3) and the outer shell (10) arranged in sequence, and the cigarette holder (1 ) is arranged in the top cover (9). The end of the top cover (9) away from the bracket (3) is provided with a cigarette hole. One end is provided with a heating element (11), a PCT (13) and a battery (12) in sequence. The heating element (11) partially extends into the bracket (3). The cigarette holder (1) is also provided with a A second through hole for the heating element (11) to partially extend into.
The heat-not-burn smoking device according to claim 19, further comprising a magnet.