sighting telescope

Abstract

The application relates to a sighting telescope, which comprises an imaging mechanism, an OLED display arranged between a light analyzing lens and a protective glass of the imaging mechanism, a laser ranging mechanism arranged axially in parallel with the imaging mechanism, the laser ranging mechanism comprising a laser emitting mechanism and a laser receiving mechanism, an input and adjustment mechanism for input setting including wind deviation, height difference or precision adjustment by hand, a master control chip for displaying target graduation and / or aiming graduation on the display, operating the input and adjustment mechanism, feeding back to the laser ranging mechanism for ranging the target, inputting the ranging result into the master control chip, performing trajectory calculation according to the shooting distance and the bullet type, displaying the aiming graduation on the display after the calculation is completed, and moving the target graduation to coincide with the aiming graduation to complete aiming. According to the sighting telescope, trajectory data can be calculated in real time, and the graduation can be automatically adjusted to complete shooting correction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photoelectric sighting device, in particular to a sighting telescope with automatically adjusted scale. BACKGROUND

[0002] The sighting telescope is assembled on the main body of a weapon system, and is mainly used for helping the user to search and find a target and hit the target quickly and accurately. The two-point-one-line quick aiming mode of the sighting telescope is suitable for quick aiming and attack on a live target at a medium or short distance. The scale inside the sighting telescope can be provided, which is mainly used for guiding the user to aim and providing a rough measurement of the distance of the target. Therefore, the scale accuracy of the sighting telescope is crucial to the hit rate of the weapon system. The scale pattern inside the sighting telescope and the convenience of the scale mechanism operation also have an important influence on whether the user can quickly and efficiently complete the task.

[0003] The conventional sighting telescope is a reflective optical system, which mainly comprises an LED and a light splitting lens with a transmission-reflection function. The light emitted by the LED is reflected by the light splitting lens and enters the human eye, and the target viewed by the human eye through the light splitting lens is coincided, so that the aiming is completed. There are usually two methods for forming the scale of the conventional sighting telescope: one is that the light emitted by the LED irradiates the scale pattern formed by the diaphragm; and the other is that the LED is directly packaged into the required scale pattern. The scale pattern usually has different patterns such as a dot, a circle, a dot circle, a cross, a triangle and a T shape. The scale pattern formed by the above two methods can usually only be designed in one pattern, and cannot be changed in real time according to the actual needs to adapt to different targets, which limits the use efficiency of the red dot sighting telescope.

[0004] The windage and elevation movement adjustment of the scale of the conventional sighting telescope is realized by a mechanical adjustment mechanism, which is usually divided into a left-right adjustment mechanism and an elevation adjustment mechanism and is separately arranged at the corresponding positions outside the body. The mechanical adjustment mechanism has the problems of limited adjustment range and adjustment accuracy due to the influence of the structure design and the machining precision.

[0005] The scale of the conventional sighting telescope cannot be dynamically adjusted in real time due to the influence of the target distance and environmental factors, so that the aiming accuracy of the firearm is reduced.

[0006] Therefore, it is urgent to develop a sighting telescope with automatically adjusted scale to solve the above problems of the conventional sighting telescope. SUMMARY

[0007] The technical problem to be solved by the present application is that the adjustment range and the adjustment accuracy of the conventional sighting telescope cannot be optimized, the scale is single, and the scale cannot be dynamically adjusted in real time.

[0008] In order to solve the above technical problems, the application provides a sighting telescope, which comprises: an imaging mechanism, the imaging mechanism is in a cylindrical structure, the cylinder has two ends, one end is close to the eye of a user, and the other end is close to an object to be aimed at, wherein a protection glass is arranged on the cross section of the end of the imaging mechanism close to the eye, a light analyzing lens is arranged on the end of the imaging mechanism close to the object, and an OLED display is arranged between the light analyzing lens and the protection glass of the imaging mechanism; wherein the user observes the coincidence degree between the target scale and the aiming scale displayed on the display through the imaging mechanism eye, and judges whether to aim; a laser ranging mechanism, the laser ranging mechanism is in a cylindrical structure, and is arranged in parallel with the imaging mechanism in the axial direction, the laser ranging mechanism comprises a laser emitting mechanism and a laser receiving mechanism; an input and adjustment mechanism, the input and adjustment mechanism is used for manually inputting and setting wind deflection, height and the like, or adjusting the scale precision; a main control chip, the main control chip is connected with the imaging mechanism, the laser ranging mechanism and the input and adjustment mechanism respectively, and the output of the main control chip is displayed on the OLED display, and the target scale and / or the aiming scale are displayed on the micro display, wherein when aiming, the display displays the target scale after the target is found, the input and adjustment mechanism is operated, the laser ranging mechanism is fed back to measure the target, the measurement result is input into the main control chip, the main control chip performs trajectory calculation according to the shooting distance and the bullet type, the aiming scale is displayed on the display after the calculation is completed, and the target scale is moved to coincide with the aiming scale, so that the aiming is completed, and shooting can be performed.

[0009] According to the embodiment of the application, the input and adjustment mechanism can be a button, which is used for manually inputting information such as wind deflection, height, wind deflection, temperature of medicine and bullet type, or adjusting the scale precision.

[0010] According to the embodiment of the application, when aiming, information such as wind deflection, temperature of medicine and bullet type can also be input through the button, the information is input into the main control chip after the input is completed, the main control chip performs calculation, the display displays the aiming scale after the calculation is completed, and the target scale coincides with the aiming scale, so that the aiming is completed, and shooting can be performed.

[0011] According to the embodiment of the application, the specification and model of the main control chip can be FM33LC023N.

[0012] According to the embodiment of the application, the specification and model of the OLED display can be a 0.19-inch micro OLED display of Meike.

[0013] According to the embodiment of the application, the display and the main control chip can be directly connected through an SPI signal line.

[0014] According to the embodiment of the application, the pattern design for the scale in the OLED display can include various styles such as a dot, a circle, a dot and a circle, a cross, a triangle and a T shape.

[0015] According to the embodiment of the present application, the OLED display can be a red high-brightness OLED display, or a single green, pure white or color display, which is not particularly limited, and is determined according to the user's needs.

[0016] According to the embodiment of the present application, the scope finder can further comprise a power supply, which is a battery pack.

[0017] According to the embodiment of the present application, the scope finder can further comprise an OLED seat for supporting and fixing the OLED display, the OLED seat being arranged in the imaging mechanism and being capable of moving forward and backward along the optical axis direction for parallax adjustment.

[0018] According to the embodiment of the present application, the light-splitting lens can be fixed to the object side of the lens barrel by means of gluing, the gluing surface of the light-splitting lens being coated with a reflective film, and the two surfaces of the light-splitting lens facing and facing away from the OLED display being coated with an anti-reflection film.

[0019] According to the embodiment of the present application, the protective glass can be coated with an anti-reflection film on both surfaces.

[0020] According to the embodiment of the present application, the scope finder can further comprise a connecting seat group for supporting and connecting the imaging mechanism, the laser ranging mechanism and the power supply.

[0021] According to the embodiment of the present application, the scope finder can work according to the following steps:

[0022] S1, system self-checking, reading information including power, scale type and brightness;

[0023] S2, adjusting the settings including scale type and scale brightness;

[0024] S3, finding the target;

[0025] S4, judging whether to range, if ranging, performing ballistic calculation and adjusting the scale, during the ballistic calculation and the scale adjustment, reading information including ranging and wind deflection as input information for the ballistic calculation, and performing automatic adjustment of the scale;

[0026] S5, performing target aiming, after the calculation is completed, displaying the aiming scale and the target scale on the display, and moving the target scale to coincide with the aiming scale, thereby completing the aiming;

[0027] S6, shooting after aiming; after shooting is completed, hiding the aiming scale, at this time, only the target scale is left on the display, the target can be re-locked, and the actions of ranging, calculating and shooting can be performed again; or after shooting, the machine is withdrawn,

[0028] Wherein, the ranging and ballistic calculation are performed in the S4 step, the ballistic is automatically calculated according to the ranging data, combined with the information including wind deflection, bullet temperature and bullet type, and the main control chip drives the split dynamic adjustment according to the ballistic calculation data;

[0029] Wherein, the S5 step further comprises: after the target is aimed, the aiming data of this time are synchronously stored, including the information of split style, brightness, wind deflection and target distance.

[0030] Compared with the prior art, the technical scheme provided by the embodiment of the application can at least achieve the following beneficial effects:

[0031] The split automatically adjusted riflescope of the application can change the style, adjust the brightness and adjust the wind deflection / high-low movement through the main control chip driving and the key implementation. The main control chip has a simple ballistic calculation function, receives the ranging data of the range finder, combines the parameters such as bullet type, wind deflection, bullet temperature and bullet type, calculates the ballistic data in real time, drives the red dot split to automatically adjust, and completes the shooting correction. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical scheme of the embodiments of the application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the application, and are not a limitation of the application.

[0033] Figure 1 is a schematic diagram of a riflescope according to an embodiment of the application;

[0034] Figure 2 is a front view cross-sectional view of a riflescope according to an embodiment of the application;

[0035] Figure 3 is a cross-sectional view of a riflescope according to an embodiment of the application;

[0036] Figure 4 is a working principle diagram of a riflescope according to an embodiment of the application;

[0037] Figure 5 is a ballistic calculation explanation schematic diagram of a riflescope according to an embodiment of the application;

[0038] Figure 6 is a main control chip connection schematic diagram of a riflescope according to an embodiment of the application. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in the specification and claims of this patent application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0041] Figure 1 This is a schematic diagram illustrating a sight according to an embodiment of the present invention; Figure 2 This is a front cross-sectional view of a sight according to an embodiment of the present invention; Figure 3 This is a cross-sectional view showing a sight according to an embodiment of the present invention; Figure 6 This is a schematic diagram showing the connection of the main control chip of the aiming scope according to an embodiment of the present invention.

[0042] like Figures 1 to 3 as well as Figure 6 As shown, the aiming scope includes: imaging mechanism 1, laser rangefinder 5, input and adjustment mechanism, and main control chip.

[0043] The imaging mechanism 1 has a cylindrical structure with two ends. One end is the eye side near the user, and the other end is the object side near the target. A protective glass 9 is installed on the cross-section of the end of the imaging mechanism 1 near the eye side, and a light-dispersing lens 2 is installed on the end of the imaging mechanism 1 near the object side. The protective glass 9 is located at the eye side of the lens barrel and is used to protect and seal the OLED display 3. The OLED display 3 is placed between the light-dispersing lens 2 and the protective glass 9 of the imaging mechanism 1. The user observes the degree of matching between the target reticle and the aiming reticle displayed on the display through the eye side of the imaging mechanism to determine whether the target has been aimed.

[0044] The laser ranging mechanism 5 is a single cylinder laser ranging machine, and the laser ranging mechanism 5 is located at the middle position of the main machine, and the laser emitting mechanism and the laser receiving mechanism are assembled into a single cylinder structure in the shape of a cylinder. The laser ranging mechanism 5 is powered by the battery pack 6, and the ranging control is provided by the main control chip 10 and implemented by the button. The ranging machine protection glass 8 plays a role in protecting and sealing the ranging machine, and the two surfaces are coated with an anti-reflection film.

[0045] The input and adjustment mechanism is used for manually inputting setting including wind deviation, height and low, or adjusting the precision of the division.

[0046] The main control chip is connected with the imaging mechanism, the laser ranging mechanism and the input and adjustment mechanism respectively, and the output of the main control chip is displayed on the OLED display 3. The target division and / or the aiming division are displayed on the micro display.

[0047] When aiming, the display displays the target division after the target is found, the input and adjustment mechanism is operated, the laser ranging mechanism is fed back to measure the target, the ranging result is input into the main control chip, the main control chip calculates the trajectory according to the shooting distance and the bullet type, the display displays the aiming division after the calculation is completed, and the target division is moved to coincide with the aiming division, so that the aiming is completed and the shooting can be performed.

[0048] According to one or some embodiments of the present application, the input and adjustment mechanism is a button, which is used for manually inputting information including wind deviation, temperature and bullet type, or adjusting the precision of the division. The button includes a weakening / wind deviation button 111, an on / off / function button 112 and an increasing / high-low button 113, which are located on the side of the main machine and are driven by the main control chip 10. The weakening / wind deviation button 111 realizes the weakening of the brightness of the division and the adjustment of the wind deviation, the increasing / high-low button 113 realizes the increasing of the brightness of the division and the adjustment of the height and low, and the on / off / function button 112 realizes the functions of turning on / off, ranging and confirming.

[0049] According to one or some embodiments of the present application, when aiming, the information including wind deviation, temperature and bullet type is input through the button 112, the input is input into the main control chip, the calculation is performed by the main control chip, the display displays the aiming division after the calculation is completed, and the aiming is completed when the target division coincides with the aiming division, so that the shooting can be performed.

[0050] According to one or some embodiments of the present application, the specification and model of the main control chip are FM33LC023N.

[0051] According to one or some embodiments of the present application, the specification and model of the OLED display are Meike 0.19 inch micro OLED display 3.

[0052] According to one or some embodiments of the present application, the display is directly connected with the master control chip through the SPI signal line without other electronic components.

[0053] According to one or some embodiments of the present application, the pattern design for division in the OLED display 3 includes multiple patterns such as dot, circle, dot circle, cross, triangle and T shape.

[0054] According to one or some embodiments of the present application, the OLED display 3 is a red high-brightness OLED display 3, or a single green, pure white or color display, which is not specifically limited and is determined according to the user's needs.

[0055] According to one or some embodiments of the present application, the scope finder further comprises a power supply, which is a battery pack 6. The battery pack 6 comprises a 18650 battery 62, a battery cover set 61, a negative electrode conductive column 63 and a positive electrode conductive column 64, which are located on the side of the main machine and simultaneously supply power to the OLED display 3 and the laser ranging mechanism 5 through the master control chip 10.

[0056] According to one or some embodiments of the present application, the scope finder further comprises an OLED seat 4 for supporting and fixing the OLED display 3. The OLED seat 4 is arranged in the imaging mechanism 1 and can move position along the optical axis direction, which is used for parallax adjustment.

[0057] According to one or some embodiments of the present application, the light analysis lens 2 is fixed on the object side of the lens barrel by adhesive. The light analysis lens 2 is coated with a reflective film on the adhesive surface, and the two surfaces facing and away from the OLED display 3 are coated with an anti-reflection film. The light analysis lens 2 can reflect the red light emitted by the OLED display 33 and transmit the natural light of the target.

[0058] According to one or some embodiments of the present application, the protective glass 9 is coated with an anti-reflection film on both surfaces.

[0059] According to one or some embodiments of the present application, the scope finder further comprises a connecting seat set 7 for supporting and connecting the imaging mechanism 1, the laser ranging mechanism 5 and the power supply. The connecting seat set 7 is located at the lowermost part of the main machine, adopts the form of international standard picatinny rail interface, is connected with the scope body by screws, and ensures the reliability of the scope. Further, the connecting seat set 7 can also adopt the form of international standard swallow tail tactical rail interface, which is not described in detail in the present embodiment. Further, the connecting seat set 7 can also be personalized according to the specific requirements of the mounted sighting device of the red dot scope, which is not described in detail in the present embodiment.

[0060] The main control chip 10 integrates the OLED display 3, the range finder, the battery pack 6 and the button driving / control function, and has the ballistic solution function. The main control chip 10 design contains the storage design, which is used for the data storage in the system. The main control chip 10 design contains the interface design, which is respectively used for the button 11 input / output management, the OLED display 3 driving control, the laser range finder mechanism 5 driving control and the power management control. The OLED display 3 can display the information such as the division, the ranging data and the battery capacity through the driving of the main control chip 10. The division pattern design has multiple styles including the point, the circle, the point circle, the cross, the triangle and the T shape. The replacement and the movement adjustment of the division style are driven through the main control chip 10. The division movement adjustment precision is designed to be different values according to the actual demand, and is implemented through the buttons. The short press of the decrease / increase button 111 adjusts the wind deflection, and the short press of the increase / decrease button 113 adjusts the height. The main control chip 10 has the ballistic solution function. After the ranging and the ballistic solution function are started, the ballistic is automatically solved according to the ranging data, combined with the wind deflection, the drug temperature, the projectile type and other parameters. The main control chip drives the division to dynamically adjust according to the ballistic solution data. The division brightness is driven through the main control chip 10. The short press of the decrease / increase button 111 decreases the brightness, and the short press of the increase / decrease button 113 increases the brightness. There are 10 grades in total, of which the first, second and third grades are used for the night grades, the micro light mirror can be used for auxiliary observation, and the other seven grades are used for the day grades, which can meet the use demand in different environments such as the daybreak (backlight), the strong light, the rain and the dusk.

[0061] Figure 4 is a working principle diagram of a scope according to an embodiment of the present application.

[0062] As shown in Figure 4 , the scope works according to the following steps for aiming:

[0063] S1, system self-checking, reading the information including the capacity, the division form and the brightness;

[0064] S2, adjusting the settings including the division style and the division brightness;

[0065] S3, finding the target;

[0066] S4, judging whether the ranging is performed. If the ranging is performed, the ballistic is solved, the division is adjusted, the ranging and the wind deflection data are manually inputted, the information including the ranging and the wind deflection is read as the input information of the ballistic solution, and the division is automatically adjusted;

[0067] S5, aiming at the target. After the solution is completed, the aiming division and the target division are displayed by the display. When the target division is moved to coincide with the aiming division, the aiming is completed.

[0068] S6. After aiming, fire; after firing, immediately hide the aiming reticle. At this time, only the target reticle remains on the display. You can re-lock onto the target, measure distance, calculate, and fire again; or you can choose not to fire and withdraw the camera after firing.

[0069] In step S4, during ranging and ballistic calculation, the ballistics are automatically calculated based on the ranging data, combined with information including wind drift, propellant temperature, and ammunition type. The main control chip drives the dynamic adjustment of the division based on the ballistic calculation data.

[0070] The S5 step also includes: after the target is aimed, the aiming data is stored synchronously, including information on the reticle pattern, brightness, wind drift, and target distance.

[0071] The sight with automatic reticle adjustment of the present invention is driven by the main control chip 10 and activated by buttons, allowing for style changes, brightness adjustment, and windage / elevation adjustment. The main control chip 10 has a ballistic calculation function, receiving range measurement data from the rangefinder, and combining it with parameters such as ammunition type, windage, propellant temperature, etc., to calculate the ballistic data in real time, and drive the automatic adjustment of the red dot reticle to complete the shooting correction.

[0072] Figure 5 This is a schematic diagram illustrating the ballistic calculation of a sight according to an embodiment of the present invention.

[0073] After the scope is powered on, the system performs a self-test. At this time, the system reads and displays information such as battery level, reticle style, and reticle brightness (the reticle style and brightness remain consistent with the previous display). The shooter can then manually select (via buttons) the reticle display style and brightness based on mission requirements, environment, and personal preference. The reticle pattern displayed on the OLED display 3 is reflected as parallel light by the light-resolving lens 2 and enters the eye. The eye can see a virtual image of the reticle and perceives this image as being at infinity. When the reticle image and the target seen through the scope tube coincide, aiming is possible. After finding the target, a decision can be made regarding rangefinding. Taking rangefinding as an example, the ballistic calculation process is detailed as follows: Due to the influence of gravity after the projectile is launched, its trajectory is parabolic. The target's line of sight is a straight line. When the target's line of sight and the projectile's trajectory coincide at the target location, the aiming point is the point of impact. Figure 5 As shown. Due to differences in projectile type (e.g., weight) and target distance (i.e., firing distance), the projectile's parabolic trajectory and descent height vary. Based on ballistic calculations, the aiming point is determined. The reticle is moved to overlap the target; the point of impact is where the reticle is aimed. Wind drift adjustment is similar to distance adjustment, but with key differences: distance adjustment, influenced by gravity, typically only adjusts the reticle vertically; wind drift adjustment, influenced by wind force, typically only adjusts the reticle horizontally. Wind drift adjustment requires manual input or external reading of wind speed and direction information.

[0074] The above-described exemplary embodiments are merely for the purpose of illustration and are not intended to limit the scope of the present application, which is defined by the appended claims.

Claims

1. A sight, comprising: An imaging mechanism, the main body of which is a cylindrical structure, has two ends: one end is the eye side near the user, and the other end is the object side near the target. A protective glass is disposed on the cross-section of the end of the imaging mechanism near the eye side, and a light-dispersing lens is disposed on the end of the imaging mechanism near the object side. An OLED display is disposed between the light-dispersing lens and the protective glass. The user observes the degree of match between the target reticle and the aiming reticle displayed on the display through the eye side of the imaging mechanism to determine whether aiming has been achieved. A laser ranging mechanism, the main body of which is a cylindrical structure and is arranged parallel to the axial direction of the imaging mechanism, the laser ranging mechanism including a laser emitting mechanism and a laser receiving mechanism; An input and adjustment mechanism is provided for adjusting the reticle accuracy by manually making input settings including wind deflection and elevation. The main control chip is connected to the imaging mechanism, the laser ranging mechanism, and the input and adjustment mechanism. The output of the main control chip is displayed on an OLED display, and the target reticle and / or aiming reticle are displayed on a micro-display. During aiming, once a target is detected, the display shows the target reticle. The operation input and adjustment mechanism feeds back to the laser rangefinder to measure the target distance. The rangefinder result is input to the main control chip, which calculates the trajectory based on the firing distance and projectile type. After the calculation is complete, the display shows the aiming reticle. Aiming is completed when the target reticle is moved to coincide with the aiming reticle. The aiming scope operates by following these steps: S1. System self-test, reads information including battery level, reticle type, and brightness; S2. Adjust settings including reticle style and reticle brightness; S3. Find the target; S4. Determine if range measurement is required. If range measurement is required, perform ballistic calculation and adjust the reticle. During ballistic calculation and reticle adjustment, manually measure the range and input wind deflection data. Read the information including range measurement and wind deflection as the input information for ballistic calculation and perform ballistic calculation. The reticle will be automatically adjusted. S5. Perform target aiming. After the calculation is completed, the aiming reticle and target reticle will be displayed on the screen. When the target reticle is moved to coincide with the aiming reticle, the aiming is completed. S6. After aiming, fire; after firing, immediately hide the aiming reticle. At this time, only the target reticle remains on the display. You can re-lock onto the target, measure distance, calculate, and fire again; or you can choose not to fire and withdraw the camera after firing. In step S4, during ranging and ballistic calculation, the ballistics are automatically calculated based on the ranging data, combined with information including wind drift, propellant temperature, and ammunition type. The main control chip drives the dynamic adjustment of the division based on the ballistic calculation data. The S5 step also includes: after the target is aimed, the aiming data is stored synchronously, including information on the reticle pattern, brightness, wind drift, and target distance.

2. The aiming scope as described in claim 1, wherein, The input and adjustment mechanism consists of buttons, which are used to manually input information including wind deflection, gun temperature, and ammunition type, or to adjust the reticle accuracy.

3. The aiming scope as described in claim 2, wherein, During aiming, information including wind drift, propellant temperature, and ammunition type is input via buttons. After input, the information is sent to the main control chip for calculation. Once the calculation is complete, the display shows the aiming reticle. When the target reticle coincides with the aiming reticle, aiming is complete.

4. The aiming scope as described in claim 1, wherein, The main control chip is model number FM33LC023N.

5. The sight as described in claim 1, wherein, The OLED display specifications are: MIKE 0.19-inch micro OLED display.

6. The sight as claimed in claim 1, wherein, The display and the main control chip are directly connected via an SPI signal line.

7. The sight as claimed in claim 1, wherein, The pattern designs used for dividing the OLED display include various styles such as dots, circles, dot-circles, crosses, triangles, and T-shapes.

8. The sight as claimed in claim 1, wherein, The OLED display is a reddish-brown high-brightness OLED display, or a single green, pure white, or color display.

9. The sight as claimed in claim 1, wherein, It also includes a power source, which is a battery pack.

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