A fall-preventing safety device for an ultrasound probe

Abstract

The application relates to the technical field of medical equipment, and discloses an anti-misdrop safety device for an ultrasonic probe, which comprises a handle shell, a protection assembly is arranged in the handle shell, the protection assembly comprises a pop-up air bag and a gas generator, a sensor module is connected to the protection assembly, and the working state of the protection assembly is controlled by a control unit; the handle shell is made of a flexible material, a locking device is arranged in the handle shell, the locking device is tightly attached to the inner surface of the handle shell, the locking device is opened when the outer surface of the handle shell is subjected to pressure, and the electric signal between the sensor module and the protection assembly is cut off when the locking device is opened; the anti-misdrop safety device can be actively opened when the ultrasonic probe falls, and the problem that the ultrasonic probe is easily damaged when falling or colliding is solved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a safety device for preventing accidental drops of an ultrasound probe. Background Technology

[0002] Ultrasound probes are core components of medical ultrasound imaging equipment and are widely used in clinical diagnosis and treatment. Due to their high precision and sensitivity, ultrasound probes are expensive to manufacture and are easily damaged by accidental drops or impacts during use. Existing ultrasound probes are typically stored and protected only by simple hangers or protective sleeves, but these measures are limited in their effectiveness in preventing accidental drops.

[0003] In the actual use of ultrasonic probes, traditional hangers or protective covers can only provide basic fixation and dust protection functions, and cannot provide effective cushioning and protection when the probe is accidentally dropped. Moreover, there is no anti-drop safety device in the existing technology that can actively protect the ultrasonic probe when it is dropped. Summary of the Invention

[0004] (I) Technical problem to be solved: In view of the shortcomings of the prior art, the present invention provides a fall protection device for ultrasonic probes, which has the advantage of being able to actively activate the fall protection device when the ultrasonic probe is dropped, thus solving the problem that ultrasonic probes are easily damaged when dropped or collided.

[0005] (II) Technical Solution: To achieve the above-mentioned objective of having an anti-fall protection device that can actively activate when an ultrasound probe is dropped, the present invention provides the following technical solution: An anti-fall protection device for an ultrasound probe, adapted to medical ultrasound equipment, and sleeved on the outer surface of the ultrasound probe, including a handle shell, wherein a pop-out protective component is provided inside the handle shell, the protective component including a pop-out airbag and a gas generator, the pop-out airbag being connected to the gas generator; the protective component is connected to a sensor module, the sensor module including a rotation angle sensor and an acceleration sensor, the sensor module controlling the working state of the gas generator through a control unit; the handle shell is made of a flexible material, and a locking device is provided inside the handle shell, the locking device being in close contact with the inner surface of the handle shell, when the outer surface of the handle shell corresponding to the locking device is gripped and pressed, the locking device is opened, and when the locking device is opened, the electrical signal between the sensor module and the protective component is cut off.

[0006] Preferably, the grip housing is annular in shape, the ultrasonic probe is placed in the inner ring of the grip housing, the grip housing can be opened and disassembled, and is fixed to the ultrasonic probe grip through a snap-fit ​​structure.

[0007] Preferably, the accelerometer in the sensor module is located at the end of the ultrasonic probe mounted on the handle housing near the overall center of gravity of the device, and the rotation angle sensor is located at the end near the working part of the ultrasonic probe.

[0008] Preferably, the handle housing has a groove on the surface facing downwards towards the ultrasonic probe, and the pop-out airbag is disposed in the groove. When the pop-out airbag is inflated, it expands upwards from the groove. The gas generator and the pop-out airbag are sealed together, and when the gas generator is activated, the generated gas enters the pop-out airbag.

[0009] Preferably, when the pop-out airbag is filled with gas, it expands upward into a ring shape, with the pop-out height exceeding the highest point of the ultrasonic probe; the ultrasonic probe is located in the inner ring of the pop-out airbag; the lower end of the pop-out airbag is fixedly connected to the inside of the handle shell, and the connection is a sealed structure.

[0010] Preferably, the outer surface of the pop-out airbag is provided with a vent hole, which is a conical air hole with an opening diameter that gradually decreases from the outer surface inward. The vent hole extends into the interior of the pop-out airbag, and an air valve system is provided at the inner end of the vent hole in the pop-out airbag. The air valve system includes a one-way valve and a solenoid valve, and the air valve system is controlled by a control unit.

[0011] Preferably, the gas generator is a chemical gas generator connected to an electric ignition device. The sensor module controls the electric ignition device to trigger a chemical reaction inside the chemical gas generator. The gas inside the gas generator is connected to the ejected airbag through a gas tube. The outer surface of the gas generator is provided with a heat insulation component. The gas generator is detachable.

[0012] Preferably, the locking device includes a first spring and a push rod. One end of the first spring is connected to the inner surface of the grip housing, and the other end is connected to the push rod. Both the first spring and the push rod are disposed inside a limiting channel. An electric contact and an energized block are disposed inside the limiting channel. A second spring is disposed at the end of the energized block away from the push rod. When the energized block is connected to the electric contact, the sensor module is energized. When the outer surface of the grip housing is pressed inward, the push rod separates the energized block from the electric contact.

[0013] (III) Beneficial Effects: Compared with the prior art, the present invention provides a fall protection device for an ultrasonic probe, which has the following beneficial effects: 1. This fall protection device for an ultrasonic probe, by attaching a fall protection device to the handle of the ultrasonic probe, ensures that it provides additional safety protection without interfering with its daily operation. Once the ultrasonic probe is accidentally released or falls, the built-in sensor module—located near the center of gravity of the probe—can quickly sense the rapid increase in acceleration to close to the Earth's gravitational acceleration of 9.8 meters per second², i.e., a state close to free fall. At this time, the sensor module immediately triggers the protection component, activating its internal gas generator, which quickly inflates the pop-out airbag, causing the airbag to expand and unfold in a very short time. Its apex height exceeds the highest point of the ultrasonic probe, forming an effective buffer barrier, thereby ensuring that the ultrasonic probe is not damaged during the fall; The drop height of acoustic probes is generally low, typically 1-2 meters, and the time from drop to ground contact is approximately 200-400 milliseconds. To ensure that the airbag fully deploys before the probe hits the ground, the response time of the device should be much shorter than the time it takes for the probe to hit the ground, ideally within 50 milliseconds. The sensor module detects the probe's drop signal, which typically takes 5-10 milliseconds. The control unit processes the sensor data and determines whether to trigger the protection components, which also typically takes 5-10 milliseconds. Therefore, we use a chemical gas generator to achieve a faster response speed. Typically, the chemical gas generator can generate gas within 10-15 milliseconds. The gas fills the airbag and fully deploys, which typically takes 10-20 milliseconds. Therefore, the total time is 30-60 milliseconds. The expansion time of the elastic airbag can be adjusted according to the solidity of the material. Therefore, after design calculations, this invention can achieve a rapid response within 50 milliseconds.

[0014] 2. This anti-drop safety device for the ultrasound probe utilizes a flexible handle housing with a locking mechanism on its inner surface. The pressure applied by the user is converted into a driving force from the first spring in the locking mechanism, causing the push rod to move along a preset limit channel. This action displaces the electrical contacts that were originally in close contact with the energized block, thus cutting off the power to the sensor module. This effectively prevents medical personnel from mistakenly triggering the sensor module's drop detection due to excessive movements during probe operation, such as swinging their arms or performing sliding examinations, avoiding unnecessary accidental deployment of the anti-drop safety device. Simultaneously, once the ultrasound probe falls from the user's hand, the grip on the handle housing disappears, and the electrical contacts automatically reset under the force of the second spring, reconnecting to the energized block. This restores power to the sensor module, immediately putting it into monitoring mode, ready to detect any potential drops. This design ensures rapid and effective protection of the ultrasound probe in unexpected situations, improving the safety and reliability of the medical equipment.

[0015] 3. The anti-drop safety device for the ultrasonic probe has a vent hole on the outer surface of the pop-out airbag. An air valve system is installed inside the vent hole. When the safety device is triggered, the airbag pops out and completely encloses the ultrasonic probe. The user can control the air valve system to open the vent hole on the outer surface of the pop-out airbag, releasing the gas inside and restoring the airbag to its initial state, ensuring the ultrasonic probe can continue to be used without hindrance. Simultaneously, because the gas generator in this safety device is a chemical gas generator, it is disposable and cannot be reused. Therefore, the user can replace the gas generator inside the handle housing to achieve multiple uses of the safety device, greatly improving its practicality and economy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention installed on the handle of an ultrasonic probe.

[0017] Figure 2 This is a schematic diagram of the pop-out airbag in this invention inflating on the handle of the ultrasonic probe.

[0018] Figure 3 This is a schematic cross-sectional view of the internal structure of the grip shell of the present invention.

[0019] Figure 4 This is a cross-sectional view of the locking device in this invention when it is closed.

[0020] Figure 5 This is a cross-sectional view of the locking device in this invention when it is open.

[0021] Figure 6 This is a schematic diagram showing the installation location of the sensor module of the present invention.

[0022] Figure 7 This is a schematic diagram of the air release hole structure on the outer surface of the pop-out airbag of the present invention.

[0023] Figure 8 This is a schematic diagram of the gas generator part of the present invention.

[0024] In the diagram: 1. Grip shell; 11. Snap-fit ​​structure; 2. Protective components; 21. Pop-up airbag; 211. Deflator; 212. Air valve system; 22. Gas generator; 221. Ignition device; 222. Heat insulation components; 3. Sensor module; 31. Rotation angle sensor; 32. Accelerometer; 4. Locking device; 41. First spring; 42. Push rod; 43. Limiting channel; 44. Electric contact; 45. Energizing block; 46. Second spring; 5. Ultrasonic probe. Detailed Implementation

[0025] 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 embodiments of the present invention, and not all embodiments. Based on the 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.

[0026] Please see Figure 1-5 A fall protection device for an ultrasound probe, adapted to medical ultrasound equipment, is sleeved and installed on the outer surface of the ultrasound probe 5. In this embodiment, it is specifically installed on the outer surface of the handle of the ultrasound probe 5 to avoid affecting the normal use of the working part of the ultrasound probe 5. The protection device includes a handle shell 1, which is made of a flexible material. In this embodiment, it uses the same polyamide fabric or nylon material as car airbags. A protective component 2 is set inside the handle shell 1. The protective component 2 is connected to a sensor module 3. The sensor module 3 includes a rotation angle sensor 31 and an acceleration sensor 32, which can detect the acceleration and rotation angle at the current installation position and analyze the data. When the acceleration approaches the force of gravity, it indicates that the device is in free fall, i.e., falling towards the ground. The sensor module 3 controls the working state of the protection component 2 through the control unit. When it is determined that the device is in a fall state, it immediately sends a signal to the protection component 2 to make the protection component 2 react. A locking device 4 is provided inside the handle shell 1. The locking device 4 is close to the inner surface of the handle shell 1. When pressure is applied to the outer surface of the handle shell 1, the locking device 4 opens. Therefore, the sensor module 3 can be turned on or off by determining whether the handle is being used. When the locking device 4 is turned on, the electrical signal between the sensor module 3 and the protection component 2 is cut off, which effectively prevents medical staff from accidentally triggering the sensor module 3 to detect a fall due to excessive movement when operating the probe, such as swinging the arm or performing a sliding examination. This avoids unnecessary accidental deployment of the anti-fall safety device.

[0027] The drop height of ultrasonic probes is generally low, typically 1-2 meters, and the time from drop to ground contact is approximately 200-400 milliseconds. To ensure the airbag fully deploys before the probe hits the ground, the device's response time should be much shorter than the probe's drop time, ideally controlled within 50 milliseconds. The sensor module detects the probe's drop signal, typically requiring 5-10 milliseconds. The control unit processes the sensor data and determines whether to trigger the protection components, typically requiring 5-10 milliseconds. Therefore, we use a chemical gas generator to achieve a faster response speed. Typically, the chemical gas generator can generate gas within 10-15 milliseconds. Gas filling the airbag and fully deploying typically requires 10-20 milliseconds, resulting in a total time of 30-60 milliseconds. The expansion time of the elastic airbag can be adjusted according to the material's solidity. Therefore, after design calculations, this invention can achieve a rapid response within 50 milliseconds. In this embodiment, the chemical gas generator uses sodium azide. Under the heating action of the ignition device, sodium azide can rapidly generate a large amount of nitrogen gas within tens of milliseconds. Moreover, nitrogen gas is non-toxic, harmless, and highly safe.

[0028] Please see Figure 1 and Figure 2 The handle housing 1 is ring-shaped, similar in shape to the probe handle itself, to minimize the impact on the doctor's feel. The ultrasound probe 5 is placed in the inner ring of the handle housing 1. Since the handle housing 1 is made of flexible material, it can be opened and closed and disassembled. It is fixed to the handle of the ultrasound probe 5 through the snap-fit ​​structure 11, which facilitates installation and disassembly. In this embodiment, the snap-fit ​​structure 11 specifically adopts the cooperation of snap-fit ​​blocks and snap-fit ​​holes. In actual use, any structure that can fix the handle housing 1 to the handle of the ultrasound probe 5 can be regarded as an equivalent replacement for the snap-fit ​​structure 11.

[0029] Please see Figure 6 The acceleration sensor 32 in the sensor module 3 is located at the end of the ultrasonic probe 5 mounting handle housing 1 near the overall center of gravity of the device, which can more accurately detect the current acceleration of the device. The rotation angle sensor 31 is located at the end near the working part of the ultrasonic probe 5, which can more accurately detect the current angle of the working end of the ultrasonic probe 5, and focus on avoiding damage to the working end.

[0030] Please see Figure 1 and Figure 2The handle housing 1 has a groove on the surface facing downwards towards the ultrasonic probe 5. This groove is used to store the ejection airbag 21 and, while providing expansion space for the ejection airbag 21, limits the expansion trajectory and shape of the ejection airbag 21. The protective component 2 includes the ejection airbag 21 and a gas generator 22. The ejection airbag 21 is placed in the groove. When the ejection airbag 21 is inflated, it expands upwards along the wall of the groove. The gas generator 22 and the ejection airbag 21 are sealed to prevent the ejection airbag 21 from leaking air. When the gas generator 22 is activated, the generated gas enters the ejection airbag 21, causing the ejection airbag 21 to expand rapidly and cushion the ultrasonic probe 5 that is about to land.

[0031] Please see Figure 2 When the ejection airbag 21 is filled with gas, it expands upward into a ring shape, and the ejection height exceeds the highest point of the ultrasonic probe 5, forming an effective buffer barrier to ensure that the ultrasonic probe 5 is not damaged during the fall. The ultrasonic probe 5 is located in the inner ring of the ejection airbag 21. The lower end of the ejection airbag 21 is fixedly connected to the inside of the handle shell 1, so that while the upper end expands and ejects, the lower end is still fixed inside the handle shell 1, and the connection is a sealed structure to avoid affecting the protective function.

[0032] In this embodiment, please refer to Figure 7 The outer surface of the pop-out airbag 21 is provided with a vent hole 211. The vent hole 211 is a conical air hole with an opening diameter that gradually decreases from the outer surface inward to optimize gas flow efficiency. The vent hole 211 extends into the pop-out airbag 21. An air valve system 212 is provided at the inner end of the vent hole 211. The air valve system 212 includes a one-way valve and a solenoid valve. The one-way valve is used to prevent gas backflow, and the solenoid valve is used to control the opening and closing of the vent hole 211. The air valve system 212 is controlled by the control unit. When the safety device has been triggered, the airbag pops out and completely covers the ultrasonic probe 5, the user can control the air valve system 212 to open the vent hole 211 on the outer surface of the pop-out airbag 21, release the gas inside the pop-out airbag 21, restore the airbag to its initial state, and ensure that the ultrasonic probe 5 can continue to be used without hindrance.

[0033] In this embodiment, please refer to Figure 8The gas generator 22 is specifically a chemical gas generator 22. Through a chemical reaction, such as the decomposition of sodium azide, the chemical gas generator 22 generates a large amount of gas in a very short time, typically 20-50 milliseconds, ensuring the airbag fully deploys before the probe touches the ground. The chemical gas generator 22 has a compact structure, occupies little space, and is suitable for integration into the grip housing 1. The chemical gas generator 22 is connected to an electric ignition device 221. When the sensor module 3 transmits the activation signal to the gas generator 22, the electric ignition device 221 triggers a chemical reaction inside the chemical gas generator 22. The gas inside the gas generator 22 is connected to the ejected airbag 21 through a gas tube. A heat insulation component 222 is provided on the outer surface of the gas generator 22 to prevent high temperatures from damaging the probe. Meanwhile, because the gas generator 22 in this safety device is a chemical gas generator 22, it is disposable and cannot be reused. Therefore, users can replace the gas generator 22 inside the grip housing 1 to achieve multiple uses of the safety device, greatly improving its practicality and economy.

[0034] In this embodiment, please refer to Figure 4 and Figure 5 The locking device 4 includes a first spring 41 and a push rod 42. One end of the first spring 41 is connected to the inner surface of the grip housing 1, and the other end is connected to the push rod 42. Both the first spring 41 and the push rod 42 are located inside the limiting channel 43. This limiting channel 43 is installed inside the grip housing 1 and contains an electric contact 44 and a energizing block 45. The pressure applied by the user to the grip is converted into a driving force of the first spring 41 on the push rod 42 in the locking mechanism, causing the push rod 42 to move along the preset limiting channel 43. This action causes the electric contact 44, which was originally in close contact with the energizing block 45, to displace, thereby cutting off the power to the sensor module 3. The power supply effectively prevents medical staff from accidentally triggering the sensor module 3's drop detection due to excessive movements when operating the probe, such as swinging their arms or performing sliding examinations, thus avoiding unnecessary accidental deployment of the anti-drop safety device. At the same time, a second spring 46 is provided at the end of the power block 45 away from the push rod 42. Once the ultrasound probe 5 is detached from the medical staff's hand, the grip force on the handle shell 1 will immediately disappear. At this time, the electric contact 44 will automatically reset under the elastic force of the second spring 46, re-establishing a connection with the power block 45, restoring power to the sensor module 3 and immediately entering the monitoring state, ready to detect whether the ultrasound probe 5 has fallen.

[0035] Continue reading Figures 4-5 By combining the first spring 41 with the push rod 42, the sudden impact on the electric contact 44 can be reduced to a certain extent, thus preventing damage to the electric contact 44. In actual use, the first spring 41 and the push rod 42 can be replaced by any mechanism that can push the electric contact 44.

[0036] Working principle: When using this safety device, the handle shell 1 is first fitted onto the outer surface of the ultrasonic probe 5 handle via the snap-fit ​​structure 11. Then, the user uses the ultrasonic probe 5 normally through the handle. At this time, the locking structure of the safety device is open, and the safety device is in the closed state. In case of an accident, such as the handle slipping out of the hand or the ultrasonic probe 5 being accidentally discarded, the pressure applied to the handle shell 1 disappears, the locking device 4 returns to its original position, and the safety device is activated. At this time, the sensor module 3 will detect the rotation angle and acceleration of the ultrasonic probe 5. When the acceleration approaches the Earth's gravitational acceleration of 9.8 meters per second², or when the rotation angle is large, the safety device is activated, the airbag 21 is inflated, and the ultrasonic probe 5 is encased inside to ensure that the ultrasonic probe 5 is not damaged.

[0037] In summary, this anti-drop safety device for an ultrasonic probe only triggers when two conditions are simultaneously met: "the ultrasonic probe 5 has acceleration and rotation angle" and "there is no pressure on the outer surface of the grip." This prevents the airbag from accidentally deploying during normal use while ensuring that the airbag deploys promptly when the probe is dropped. The sensor module 3 monitors the probe's motion in real time, and in conjunction with the gas generator 22 and the pop-out airbag 21, provides active protection by rapidly deploying the airbag when the probe is dropped, effectively buffering the impact and preventing probe damage. The locking device 4 cuts off the signal between the sensor module 3 and the protection component 2 when pressure is applied to the outer surface of the grip, preventing accidental airbag deployment due to misoperation during normal use and improving the device's safety.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drop protection device for an ultrasound probe, adapted to medical ultrasound equipment, sleeved and installed on the outer surface of the ultrasound probe (5), comprising a handle housing (1), characterized in that: The grip shell (1) is provided with a pop-out protective component (2) inside. The protective component (2) includes a pop-out airbag (21) and a gas generator (22). The pop-out airbag (21) is connected to the gas generator (22). The protective component (2) is connected to a sensor module (3). The sensor module (3) includes a rotation angle sensor (31) and an acceleration sensor (32). The sensor module (3) controls the working state of the gas generator (22) through a control unit. The grip shell (1) is made of flexible material. The grip shell (1) is provided with a locking device (4) inside. The locking device (4) is close to the inner surface of the grip shell (1). When the outer surface of the grip shell (1) and the locking device (4) at the corresponding position is gripped and pressed, the locking device (4) is opened. When the locking device (4) is opened, the electrical signal between the sensor module (3) and the protective component (2) is cut off. The grip shell (1) is ring-shaped, and the ultrasonic probe (5) is placed in the inner ring of the grip shell (1). The grip shell (1) can be opened and closed and disassembled, and is fixed on the grip of the ultrasonic probe (5) by a snap-fit ​​structure (11). The handle housing (1) has a groove on the surface facing downwards at one end towards the ultrasonic probe (5). The pop-out airbag (21) is placed in the groove. When the pop-out airbag (21) is inflated, it expands upwards from the groove. The gas generator (22) and the pop-out airbag (21) are sealed together. When the gas generator (22) is activated, the generated gas enters the pop-out airbag (21). When the pop-out airbag (21) is filled with gas, it expands upward into a ring shape, and the pop-out height exceeds the highest point of the ultrasonic probe (5); the ultrasonic probe (5) is located in the inner ring of the pop-out airbag (21); the lower end of the pop-out airbag (21) is fixedly connected to the inside of the handle shell (1), and the connection is a sealed structure. The gas generator (22) is specifically a chemical gas generator (22), which is connected to an electric ignition device (221). The sensor module (3) controls the electric ignition device (221) to trigger a chemical reaction inside the chemical gas generator (22). The gas inside the gas generator (22) is connected to the pop-out airbag (21) through a gas pipe. The outer surface of the gas generator (22) is provided with a heat insulation component (222). The gas generator (22) is detachable.

2. The anti-drop safety device for an ultrasonic probe according to claim 1, characterized in that: The acceleration sensor (32) in the sensor module (3) is located at one end of the ultrasonic probe (5) where the handle housing (1) is installed, close to the center of gravity of the device. The rotation angle sensor (31) is located at one end close to the working part of the ultrasonic probe (5).

3. A drop protection device for an ultrasonic probe according to any one of claims 1, characterized in that: The outer surface of the pop-out airbag (21) is provided with a vent hole (211). The vent hole (211) is a conical air hole with an opening diameter that gradually decreases from the outer surface inward. The vent hole (211) extends into the pop-out airbag (21). An air valve system (212) is provided at the inner end of the vent hole (211) in the pop-out airbag (21). The air valve system (212) includes a one-way valve and a solenoid valve. The air valve system (212) is controlled by a control unit.

4. A drop protection device for an ultrasonic probe according to claim 1, characterized in that: The locking device (4) includes a first spring (41) and a push rod (42). One end of the first spring (41) is connected to the inner surface of the grip shell (1), and the other end is connected to the push rod (42). The first spring (41) and the push rod (42) are both located inside the limiting channel (43). The limiting channel (43) is provided with an electric contact (44) and an energized block (45). A second spring (46) is provided at the end of the energized block (45) away from the push rod (42). When the energized block (45) is connected to the electric contact (44), the sensor module (3) is energized. When the outer surface of the grip shell (1) is pressed inward, the push rod (42) separates the energized block (45) from the electric contact (44).

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