Flashlight

Abstract

The utility model relates to a flashlight which comprises a lamp holder and a tail cover. The flashlight body is connected between the lamp holder and the tail cover; the flashlight body comprises an outer flashlight body and an inner flashlight body arranged in the outer flashlight body, the outer flashlight body is provided with a first port connected with the flashlight head and a second port away from the flashlight head, and the inner flashlight body is arranged in the outer flashlight body in the length direction of the outer flashlight body in a position-adjustable mode. And the tail cover at least has a folding state in which the main body part of the tail cover is accommodated in the outer barrel and an extending state in which the main body part of the tail cover extends out of the second port of the outer barrel, and the tail cover is connected with the inner barrel at least when the inner barrel is in the extending state. The utility model has the advantages that different numbers of batteries can be selectively mounted, and accessories are not easy to lose.

Description

Technical Field

[0001] The utility model relates to the technical field of flashlights, in particular to a flashlight with adjustable length. Background Art

[0002] Existing flashlights usually use a single battery, which makes the flashlight's battery life short and the brightness is also affected to a certain extent. In order to solve this problem, the Chinese utility model patent application with application number CN201220378194.5 (authorization announcement number: CN202852438U) discloses a high-intensity flashlight, which includes a head, a long barrel body of the flashlight, a short barrel body of the flashlight and a tail cover; it also includes an attack head, an LED lamp, a light cup, a heat dissipation ring and a drive board. The head, the long barrel body of the flashlight and the short barrel body of the flashlight are threadedly connected, the tail cover is arranged at the tail of the short barrel body of the flashlight, the attack head is arranged at the top of the head, the LED lamp and the light cup are arranged at the center position inside the head, the drive board is connected to the LED lamp, and the heat dissipation ring is arranged at the outer ring of the tail of the head. Batteries can be placed in the long barrel body of the flashlight, and one battery, two batteries, and three batteries can be used. It has strong brightness, strong heat dissipation effect, high safety factor, and long battery life.

[0003] The flashlight in the above patent application is used to adjust the overall length of the flashlight by switching or combining the long barrel and short barrel accessories that are threaded together, so as to install different numbers of batteries. However, since the long barrel and short barrel accessories are independently detachable, when using a single battery or a small number of batteries, the excess barrel accessories must be stored. If there is no special storage box or container, these accessories are easily lost, which brings a bad user experience.

[0004] Therefore, existing flashlight also needs further improvement. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a flashlight which can be installed with different numbers of batteries and whose accessories are not easily lost, in view of the current status of the prior art.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a flashlight, comprising:

[0007] Lamp head and tail cover;

[0008] The barrel is connected between the lamp cap and the tail cover;

[0009] The barrel body includes an outer barrel and an inner barrel arranged in the outer barrel, the outer barrel having a first port connected to the lamp holder and a second port away from the lamp holder, the inner barrel being arranged in the outer barrel in an adjustable position along the length direction of the outer barrel, and having at least a folded state in which the main body is accommodated in the outer barrel and an extended state in which the main body is extended from the second port of the outer barrel, at least when the inner barrel is in the extended state, the tail cover is connected to the inner barrel.

[0010] Generally, when the inner tube is in the retracted state, the tail cover can be connected to the second port of the outer tube, or connected to the end of the inner tube (such as the end of the inner tube is slightly exposed relative to the outer tube). However, in order to simplify the processing of the flashlight and reduce production costs, the tail cover is connected to the inner tube regardless of whether it is in the retracted state or the extended state, so that only the corresponding connecting part is provided on the inner tube, simplifying the processing process, that is, when the inner tube is in the retracted state, the tail cover is connected to the end of the inner tube and abuts against the end wall of the second port of the outer tube. When the inner tube is in the retracted state, it abuts against the end wall of the second port of the outer tube, which can ensure the overall strength of the flashlight on the one hand and avoid the shaking problem of the inner tube relative to the outer tube, and on the other hand, it can also eliminate the gap between the inner tube and the outer tube to prevent dust or dirt from entering.

[0011] In order to ensure the overall aesthetics of the flashlight, when the inner tube is in the folded state, the outer peripheral wall of the tail cover is flush with the outer peripheral wall of the end of the inner tube or has a smooth transition at the junction of the two.

[0012] As a preferred solution for adjusting the length of the barrel, an inner thread is provided on the inner circumferential wall of the outer barrel, and an outer thread matched with the inner thread is provided on the outer circumferential wall of the inner barrel. The outer barrel and the inner barrel can adjust their relative positions by cooperating with the inner thread and the outer thread. This position-adjustable connection method can ensure that the inner barrel can always be fixed relative to the outer barrel during the adjustment process, and is not prone to shaking. In particular, the extension length of the inner barrel relative to the outer barrel can be set at will to install different numbers of batteries. For example, the maximum extension length of the inner barrel relative to the outer barrel and the half extension length (half of the maximum length) of the inner barrel relative to the outer barrel can install different numbers of batteries.

[0013] The external thread on the outer circumferential wall of the inner cylinder can cover the entire outer circumferential wall of the inner cylinder, or can be only provided in a section at the fourth port of the inner cylinder. Preferably, in order to avoid the inner cylinder having exposed threads on its outer circumferential wall when it is in the extended state and affecting its aesthetics, the inner cylinder has a third port for connecting to the tail cover and a fourth port away from the tail cover, and the outer circumferential wall of the inner cylinder has a first convex edge protruding radially outward adjacent to the fourth port, and the first convex edge is provided with an external thread that matches the internal thread on the inner circumferential wall of the outer cylinder.

[0014] In order to facilitate the installation of the inner tube into the outer tube, the first port of the outer tube forms an installation port for the inner tube to be installed into the outer tube, and the inner circumferential wall of the outer tube is provided with a limit stopper protruding radially inwards adjacent to its second port to limit the first convex edge of the inner tube from axially escaping from the second port. The first convex edge cooperates with the limit stopper to limit the extreme position of the inner tube in the process of extending relative to the outer tube, thereby preventing the inner tube from escaping relative to the outer tube. The above-mentioned limit stopper can be a stopper or convex edge structure designed as a whole with the main body of the outer tube, or a separate component independent of the outer tube installed at the second port of the outer tube, such as a retaining ring or retaining sheet structure embedded and installed on the inner circumferential wall of the outer tube.

[0015] Generally, the internal thread on the inner circumferential wall of the outer cylinder can be set as a complete section from the location of the first port to the location of the second port, or a section in a certain area between the two ports, or it can be set as two or more sections arranged at intervals. Preferably, the internal thread on the inner circumferential wall of the outer cylinder extends from the location of the first port to the location of the second port.

[0016] As another preferred solution for adjusting the length of the barrel, the inner circumferential wall of the outer barrel has a first connecting portion adjacent to its first port, and a second connecting portion adjacent to its second port, the inner barrel has a third port for connecting to the tail cover and a fourth port away from the tail cover, the outer circumferential wall of the inner barrel has a third connecting portion adjacent to its fourth port, when the inner barrel is in a retracted state, the third connecting portion of the inner barrel is connected to the first connecting portion, and when the inner barrel is in an extended state, the third connecting portion of the inner barrel is connected to the second connecting portion.

[0017] The connection between the first connection part of the outer tube and the third connection part of the inner tube, and between the second connection part of the outer tube and the third connection part of the inner tube can be various connection structures such as threaded connection and rotational clamping that can achieve axial limitation of the two. Preferably, the first connection part of the outer tube is a first threaded part with an internal thread, the second connection part is a second threaded part with an internal thread, and the third connection part of the inner tube is a third threaded part with an external thread. The inner diameter of the portion of the inner circumferential wall of the outer tube located between the first threaded part and the second threaded part is larger than the inner diameters of the first threaded part and the second threaded part.

[0018] As an improvement, it also includes batteries arranged in the barrel body, and when the inner barrel is in the extended state, the number of batteries placed in the barrel body is at least two. It is conceivable that the length of the outer barrel can be the same as or different from the length of the inner barrel, and correspondingly, when the inner barrel is in the retracted state, the number of installed batteries can be one, two, or more than two, and when the inner barrel is in the extended state, the number of batteries added can be one, two, or more than two, that is, the length of the inner barrel extended is adapted to the number of batteries that need to be added.

[0019] Compared with the prior art, the utility model has the following advantages: the length of the barrel of the flashlight in the utility model can be telescopically adjusted, and different numbers of batteries can be installed according to actual needs, wherein the barrel includes an outer barrel and an inner barrel, the inner barrel is arranged in the outer barrel, and the position can be adjusted along the length direction of the outer barrel, thereby, when a small number of batteries need to be installed, the main part of the inner barrel can be stored in the outer barrel, and there is no need to remove it separately for storage, and it is not easy to lose; when a large number of batteries need to be installed, the inner barrel can be extended relative to the outer barrel, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the flashlight of Example 1 of the utility model (the inner tube is in a folded state);

[0021] Figure 2 This is a three-dimensional structural schematic diagram of a flashlight in Embodiment 1 of the utility model (the inner tube is in an extended state);

[0022] Figure 3 This is an axial cross-sectional view of the flashlight of Example 1 of the utility model (the inner tube is in a retracted state);

[0023] Figure 4 This is an axial cross-sectional view of the flashlight of Example 1 of the utility model (the inner tube is in an extended state);

[0024] Figure 5 It is an axial cross-sectional stereoscopic view of the inner cylinder of the flashlight of Example 1 of the utility model;

[0025] Figure 6 This is an axial cross-sectional view of a flashlight according to Embodiment 2 of the present utility model (the inner tube is in a retracted state);

[0026] Figure 7 This is an axial cross-sectional view of a flashlight of Embodiment 2 of the utility model (the inner tube is in an extended state);

[0027] Figure 8 This is an axial cross-sectional stereoscopic view of the outer tube of a flashlight according to Embodiment 2 of the present utility model. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0029] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0030] Example 1

[0031] Figure 1-Figure 5 A preferred embodiment of the flashlight of the utility model is shown. The flashlight includes a lamp holder 10, a barrel 20 and a tail cover 30. The lamp holder 10 generally includes components such as a lampshade, a reflector cup, a fixing switch and a lamp bead light source, wherein the lampshade is mainly used to support and fix the light source, and can also play a role in adjusting the focus of the light. The reflector cup is used to reflect and focus the light. It is usually a metal bowl-shaped part located around the light bulb, which enhances the lighting effect of the flashlight by reflecting and adjusting the light. The fixing ring connects the lamp holder 10 and other parts of the flashlight, such as the barrel 20, to ensure the stability and reliability of the lamp holder 10. The specific structure and working principle of the lamp holder 10 are all prior art and will not be repeated here.

[0032] See also Figure 1 and Figure 2The length of the barrel 20 of the flashlight of this embodiment can be adjusted telescopically. Specifically, the barrel 20 includes an outer barrel 21 and an inner barrel 22 disposed in the outer barrel 21. The inner barrel 22 is disposed in the outer barrel 21 in an adjustable position along the length direction of the outer barrel 21. The outer barrel 21 has a first port 211 connected to the lamp holder 10 and a second port 212 away from the lamp holder 10. The inner barrel 22 has a third port 221 connected to the tail cover 30 and a fourth port 222 away from the tail cover 30. Generally, the axial length of the inner barrel 22 is substantially the same as that of the outer barrel 21, or is smaller than that of the outer barrel 21. The inner barrel 22 has at least a retracted state in which its main body is stored in the outer barrel 21 and an extended state in which its main body extends from the second port 212 of the outer barrel 21 as its position relative to the outer barrel 21 changes. Among them, “the main body of the inner tube 22 is accommodated in the outer tube 21” can be understood as the entirety of the inner tube 22 is completely located in the outer tube 21, that is, the end edge of the inner tube 22 is located in the outer tube 21 or is flush with the corresponding end edge of the outer tube 21. It can also be understood that most of the inner tube 22 is located in the outer tube 21, and the end edge of the inner tube 22 will be exposed from the second port 212 of the outer tube 21 (for connecting the tail cover 30).

[0033] Generally, when the inner tube 22 is in the retracted state, the tail cover 30 can be connected to the second port 212 of the outer tube 21, or connected to the end of the inner tube 22 (such as the end of the inner tube 22 is slightly exposed relative to the outer tube 21), but in order to simplify the processing of the flashlight and reduce the production cost, when the inner tube 22 is in the extended state, the tail cover 30 is connected to the inner tube 22, and similarly, when the inner tube 22 is in the retracted state, the tail cover 30 is also connected to the end of the inner tube 22. After the tail cover 30 is screwed into place, it abuts against the end wall of the second port 212 of the outer tube 21. Regardless of whether it is in the retracted state or the extended state, the tail cover 30 is connected to the inner tube 22, so that only the corresponding connection part is provided on the inner tube 22, simplifying the processing process. The tail cover 30 abuts against the end wall of the second port 212 of the outer tube 21, which can ensure the overall strength of the flashlight and prevent the inner tube 22 from shaking relative to the outer tube 21. On the other hand, it can also eliminate the gap between the inner tube 22 and the outer tube 21 to prevent dust or dirt from entering. In a preferred embodiment of the utility model, when the inner tube 22 is in the folded state, the outer peripheral wall of the tail cover 30 is flush with the outer peripheral wall of the end of the inner tube 22 or smoothly transitions at the junction of the two, thereby ensuring the overall aesthetics of the flashlight.

[0034] The tail cover 30 and the fourth port 222 of the inner tube 22 may also be connected via threads.

[0035] The inner circumferential wall of the outer cylinder 21 of this embodiment is provided with an internal thread 210. Generally, the internal thread 210 on the inner circumferential wall of the outer cylinder 21 can be provided with a complete section from the location of the first port 211 to the location of the second port 212, or a section in a certain area between the two ports, or two or more sections arranged at intervals. In a preferred embodiment, the internal thread 210 on the inner circumferential wall of the outer cylinder 21 extends from the location of the first port 211 to the location of the second port 212. Correspondingly, the outer circumferential wall of the inner cylinder 22 is provided with an external thread 220 matched with the internal thread. The outer cylinder 21 and the inner cylinder 22 are adjusted relative to each other through the cooperation of the internal thread 210 and the external thread 220. More specifically, the outer circumferential wall of the inner cylinder 22 has a first convex edge 2221 protruding radially outwards near the fourth port 222, and the first convex edge 2221 is provided with an external thread 220 matched with the internal thread on the inner circumferential wall of the outer cylinder 21. Since the outer diameter of the first convex edge 2221 is larger than the inner diameter of the main body of the inner cylinder 22, in order to facilitate the installation of the inner cylinder 22, the first port 211 of the outer cylinder 21 forms an installation opening for the inner cylinder 22 to be installed in the outer cylinder 21, that is, the inner diameter of the installation opening should be at least slightly larger than the outer diameter of the first convex edge 2221 of the inner cylinder 22. The inner peripheral wall of the outer cylinder 21 is provided with a limit stopper 2121 protruding radially inwardly adjacent to the second port 212 thereof to limit the first convex edge 2221 of the inner cylinder 22 from axially escaping from the second port 212. The limit stopper 2121 of this embodiment can be a stopper or convex edge structure designed integrally with the main body of the outer cylinder 21, or can be a separate component independent of the outer cylinder 21 and installed at the second port 212 of the outer cylinder 21, such as a retaining ring or retaining sheet structure embedded and installed on the inner peripheral wall of the outer cylinder 21. The cooperation between the first protrusion 2221 of the inner tube 22 and the limit stop 2121 of the outer tube 21 can limit the extreme position of the inner tube 22 relative to the outer tube 21 during its extension, so as to prevent the inner tube 22 from falling out relative to the outer tube 21.

[0036] See also Figure 4 A sealing ring (not shown) is also installed on the inner circumferential wall of the outer cylinder 21 near its second port 212, and the sealing ring can be installed in the embedded groove 213 provided on the inner circumferential wall of the outer cylinder 21. When the inner cylinder 22 moves axially relative to the outer cylinder 21, the sealing ring is in frictional contact with the outer circumferential wall of the main body of the inner cylinder 22, which has a damping feel and improves the user's use experience.

[0037] The threaded connection between the inner cylinder 22 and the outer cylinder 21 to achieve telescopic adjustment can ensure that the inner cylinder 22 can always be fixed relative to the outer cylinder 21 during the telescopic adjustment process, and is not prone to shaking. In particular, the extension length of the inner cylinder 22 relative to the outer cylinder 21 can be set at will to install different numbers of batteries. For example, the maximum extension length of the inner cylinder 22 relative to the outer cylinder 21 and the half extension length (half of the maximum length) of the inner cylinder 22 relative to the outer cylinder 21 can install different numbers of batteries.

[0038] The length of the outer tube 21 of this embodiment can be the same as or different from the length of the inner tube 22. Correspondingly, when the inner tube 22 is in the folded state, the number of batteries installed can be one or two or more, and when the inner tube 22 is in the extended state, the number of batteries added (relative to the number of batteries installed on the barrel body 20 in the folded state) can be one, two or more, that is, the extended length of the inner tube 22 is adapted to the number of batteries that need to be added. Among them, since the extended length of the inner tube 22 relative to the outer tube 21 is adjustable, in addition to adapting to different numbers of the same type of batteries, it can also adapt to different types of batteries, such as No. 5 batteries, No. 7 batteries, or rechargeable batteries with similar outer diameters can be used in combination.

[0039] The length of the barrel 20 of the flashlight of the present embodiment can be adjusted telescopically, and different numbers of batteries can be installed according to actual needs, wherein the barrel 20 includes an outer barrel 21 and an inner barrel 22, wherein the inner barrel 22 is disposed in the outer barrel 21 and can be adjusted along the length direction of the outer barrel 21. Thus, when a small number of batteries need to be installed, the main body of the inner barrel 22 can be stored in the outer barrel 21, and there is no need to remove it separately for storage, and it is not easy to lose. When a large number of batteries need to be installed, the inner barrel 22 can be extended relative to the outer barrel 21, which is easy to operate.

[0040] Example 2

[0041] Figure 6-Figure 8Another preferred embodiment of the flashlight of the utility model is shown. The difference between this embodiment and embodiment 1 is that the telescopic adjustment structure between the outer tube 21 and the inner tube 22 of the tube body 20 is different. Specifically, the inner peripheral wall of the outer tube 21 of this embodiment has a first connection part 2110 near its first port 211, and a second connection part 2120 near its second port 212, while the outer peripheral wall of the inner tube 22 has a third connection part 2222 near its fourth port 222. Specifically, when the inner tube 22 is in a retracted state, the third connection part 2222 of the inner tube 22 is connected to the first connection part 2110, and when the inner tube 22 is in an extended state, the third connection part 2222 of the inner tube 22 is connected to the second connection part 2120. The connection between the first connection part 2110 of the outer cylinder 21 and the third connection part 2222 of the inner cylinder 22, and between the second connection part 2120 of the outer cylinder 21 and the third connection part 2222 of the inner cylinder 22 can be a threaded connection, a rotational clamping connection, or other various connection structures that can achieve axial limitation of the two. In some preferred embodiments, the first connection part 2110 of the outer cylinder 21 is a first threaded part with an internal thread, the second connection part 2120 is a second threaded part with an internal thread, and the third connection part 2222 of the inner cylinder 22 is a third threaded part with an external thread, wherein the outer circumferential wall of the inner cylinder 22 also has a second convex edge protruding radially outward at a position adjacent to its fourth port 222, and the third threaded portion is located on the outer circumferential wall of the above-mentioned second convex edge.

[0042] The portion between the first threaded portion and the second threaded portion on the inner circumferential wall of the outer cylinder 21 is a smooth section 214, the inner diameter of which is larger than the inner diameters of the first threaded portion and the second threaded portion, wherein the inner diameters of the first threaded portion and the second threaded portion are the same. When the inner cylinder 22 is extended and adjusted, after the third threaded portion of the inner cylinder 22 is separated from the first threaded portion of the outer cylinder 21, it can be directly pulled outward by sliding in a straight line along the smooth section until it contacts the second threaded portion of the outer cylinder 21 for threaded connection and fixation.

[0043] The inner circumferential wall of the outer cylinder 21 of this embodiment is also provided with a stopper 2121 protruding radially inwards adjacent to the second port 212 thereof for limiting the second convex edge of the inner cylinder 22 from axially escaping from the second port 212 .

Claims

1. A flashlight, comprising: A lamp holder (10) and a tail cover (30); The barrel (20) is connected between the lamp holder (10) and the tail cover (30); The invention is characterized in that: the barrel body (20) comprises an outer barrel (21) and an inner barrel (22) arranged in the outer barrel (21); the outer barrel (21) has a first port (211) connected to the lamp holder (10) and a second port (212) away from the lamp holder (10); the inner barrel (22) is arranged in the outer barrel (21) in an adjustable position along the length direction of the outer barrel (21) and has at least a folded state in which the main body is accommodated in the outer barrel (21) and an extended state in which the main body is extended from the second port (212) of the outer barrel (21); at least when the inner barrel (22) is in the extended state, the tail cover (30) is connected to the inner barrel (22).

2. The flashlight according to claim 1, characterized in that: When the inner tube (22) is in a folded state, the tail cover (30) is connected to the end of the inner tube (22) and abuts against the end wall of the second port (212) of the outer tube (21).

3. The flashlight according to claim 2, characterized in that: When the inner cylinder (22) is in a folded state, the outer peripheral wall of the tail cover (30) is flush with the outer peripheral wall of the end of the inner cylinder (22) or smoothly transitions to the position where the two meet.

4. The flashlight according to any one of claims 1 to 3, characterized in that: The inner wall of the outer cylinder (21) is provided with an internal thread, and the outer wall of the inner cylinder (22) is provided with an external thread matched with the internal thread. The relative positions of the outer cylinder (21) and the inner cylinder (22) are adjusted by the cooperation of the internal thread and the external thread.

5. The flashlight according to claim 4, characterized in that: The inner cylinder (22) has a third port (221) for connecting to the tail cover (30) and a fourth port (222) away from the tail cover (30); the outer peripheral wall of the inner cylinder (22) has a first convex edge (2221) protruding radially outwards at a position adjacent to the fourth port (222); the first convex edge (2221) is provided with an external thread that matches the internal thread on the inner peripheral wall of the outer cylinder (21).

6. The flashlight according to claim 5, characterized in that: The first port (211) of the outer cylinder (21) forms an installation port for the inner cylinder (22) to be installed in the outer cylinder (21), and the inner peripheral wall of the outer cylinder (21) is provided with a limit stopper (2121) protruding radially inwards at a position adjacent to the second port (212) thereof for limiting the first flange (2221) of the inner cylinder (22) from escaping from the second port (212) in the axial direction.

7. The flashlight according to claim 4, characterized in that: The internal thread on the inner peripheral wall of the outer cylinder (21) extends from the location of the first port (211) to the location of the second port (212).

8. The flashlight according to any one of claims 1 to 3, characterized in that: The outer tube (21) has a first connection portion (2110) on its inner peripheral wall adjacent to its first port (211), and has a second connection portion (2120) adjacent to its second port (212); the inner tube (22) has a third port (221) for connecting to the tail cover (30) and a fourth port (222) away from the tail cover (30); the outer peripheral wall of the inner tube (22) has a third connection portion (2222) adjacent to its fourth port (222); when the inner tube (22) is in a retracted state, the third connection portion (2222) of the inner tube (22) is connected to the first connection portion (2110); when the inner tube (22) is in an extended state, the third connection portion (2222) of the inner tube (22) is connected to the second connection portion (2120).

9. The flashlight according to claim 8, characterized in that: The first connection portion (2110) of the outer cylinder (21) is a first threaded portion provided with an internal thread, the second connection portion (2120) is a second threaded portion provided with an internal thread, the third connection portion (2222) of the inner cylinder (22) is a third threaded portion provided with an external thread, and the inner diameter of a portion of the inner circumferential wall of the outer cylinder (21) located between the first threaded portion and the second threaded portion is greater than the inner diameters of the first threaded portion and the second threaded portion.

10. The flashlight according to any one of claims 1 to 3, characterized in that: It also includes batteries arranged in the barrel body (20); when the inner barrel (22) is in an extended state, the number of batteries placed in the barrel body (20) is at least two.

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